diff --git a/examples/voip/Server.cpp b/examples/voip/Server.cpp
index 214fe8d6..cdf893a7 100644
--- a/examples/voip/Server.cpp
+++ b/examples/voip/Server.cpp
@@ -82,7 +82,7 @@ private:
         // (don't forget that we run in two separate threads)
         {
             std::scoped_lock lock(m_mutex);
-            m_tempBuffer.assign(m_samples.begin() + static_cast<std::vector<sf::Int64>::difference_type>(m_offset),
+            m_tempBuffer.assign(m_samples.begin() + static_cast<std::vector<std::int64_t>::difference_type>(m_offset),
                                 m_samples.end());
         }
 
diff --git a/include/SFML/Audio/Music.hpp b/include/SFML/Audio/Music.hpp
index 20f0069f..76b57da1 100644
--- a/include/SFML/Audio/Music.hpp
+++ b/include/SFML/Audio/Music.hpp
@@ -239,7 +239,7 @@ protected:
     /// \return The seek position after looping (or -1 if there's no loop)
     ///
     ////////////////////////////////////////////////////////////
-    Int64 onLoop() override;
+    std::int64_t onLoop() override;
 
 private:
     ////////////////////////////////////////////////////////////
diff --git a/include/SFML/Audio/SoundStream.hpp b/include/SFML/Audio/SoundStream.hpp
index 2dd2ddd4..24e3d956 100644
--- a/include/SFML/Audio/SoundStream.hpp
+++ b/include/SFML/Audio/SoundStream.hpp
@@ -249,7 +249,7 @@ protected:
     /// \return The seek position after looping (or -1 if there's no loop)
     ///
     ////////////////////////////////////////////////////////////
-    virtual Int64 onLoop();
+    virtual std::int64_t onLoop();
 
     ////////////////////////////////////////////////////////////
     /// \brief Set the processing interval
@@ -347,7 +347,7 @@ private:
     std::int32_t                 m_format;               //!< Format of the internal sound buffers
     bool                         m_loop;                 //!< Loop flag (true to loop, false to play once)
     Uint64                       m_samplesProcessed;     //!< Number of samples processed since beginning of the stream
-    Int64                        m_bufferSeeks[BufferCount]; //!< If buffer is an "end buffer", holds next seek position, else NoLoop. For play offset calculation.
+    std::int64_t                 m_bufferSeeks[BufferCount]; //!< If buffer is an "end buffer", holds next seek position, else NoLoop. For play offset calculation.
     Time m_processingInterval; //!< Interval for checking and filling the internal sound buffers.
 };
 
diff --git a/include/SFML/Config.hpp b/include/SFML/Config.hpp
index 9cc833b8..39648c6f 100644
--- a/include/SFML/Config.hpp
+++ b/include/SFML/Config.hpp
@@ -168,7 +168,6 @@
 namespace sf
 {
 // 64 bits integer types
-using Int64  = std::int64_t;
 using Uint64 = std::uint64_t;
 
 } // namespace sf
diff --git a/include/SFML/Network/Packet.hpp b/include/SFML/Network/Packet.hpp
index 93346b84..01ba3bef 100644
--- a/include/SFML/Network/Packet.hpp
+++ b/include/SFML/Network/Packet.hpp
@@ -243,7 +243,7 @@ public:
     ////////////////////////////////////////////////////////////
     /// \overload
     ////////////////////////////////////////////////////////////
-    Packet& operator>>(Int64& data);
+    Packet& operator>>(std::int64_t& data);
 
     ////////////////////////////////////////////////////////////
     /// \overload
@@ -324,7 +324,7 @@ public:
     ////////////////////////////////////////////////////////////
     /// \overload
     ////////////////////////////////////////////////////////////
-    Packet& operator<<(Int64 data);
+    Packet& operator<<(std::int64_t data);
 
     ////////////////////////////////////////////////////////////
     /// \overload
diff --git a/include/SFML/System/FileInputStream.hpp b/include/SFML/System/FileInputStream.hpp
index f704efa5..30223660 100644
--- a/include/SFML/System/FileInputStream.hpp
+++ b/include/SFML/System/FileInputStream.hpp
@@ -114,7 +114,7 @@ public:
     /// \return The number of bytes actually read, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] Int64 read(void* data, Int64 size) override;
+    [[nodiscard]] std::int64_t read(void* data, std::int64_t size) override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Change the current reading position
@@ -124,7 +124,7 @@ public:
     /// \return The position actually sought to, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] Int64 seek(Int64 position) override;
+    [[nodiscard]] std::int64_t seek(std::int64_t position) override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Get the current reading position in the stream
@@ -132,7 +132,7 @@ public:
     /// \return The current position, or -1 on error.
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] Int64 tell() override;
+    [[nodiscard]] std::int64_t tell() override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Return the size of the stream
@@ -140,7 +140,7 @@ public:
     /// \return The total number of bytes available in the stream, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    Int64 getSize() override;
+    std::int64_t getSize() override;
 
 private:
     ////////////////////////////////////////////////////////////
diff --git a/include/SFML/System/InputStream.hpp b/include/SFML/System/InputStream.hpp
index 74997d7a..c91c84f7 100644
--- a/include/SFML/System/InputStream.hpp
+++ b/include/SFML/System/InputStream.hpp
@@ -62,7 +62,7 @@ public:
     /// \return The number of bytes actually read, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] virtual Int64 read(void* data, Int64 size) = 0;
+    [[nodiscard]] virtual std::int64_t read(void* data, std::int64_t size) = 0;
 
     ////////////////////////////////////////////////////////////
     /// \brief Change the current reading position
@@ -72,7 +72,7 @@ public:
     /// \return The position actually sought to, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] virtual Int64 seek(Int64 position) = 0;
+    [[nodiscard]] virtual std::int64_t seek(std::int64_t position) = 0;
 
     ////////////////////////////////////////////////////////////
     /// \brief Get the current reading position in the stream
@@ -80,7 +80,7 @@ public:
     /// \return The current position, or -1 on error.
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] virtual Int64 tell() = 0;
+    [[nodiscard]] virtual std::int64_t tell() = 0;
 
     ////////////////////////////////////////////////////////////
     /// \brief Return the size of the stream
@@ -88,7 +88,7 @@ public:
     /// \return The total number of bytes available in the stream, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    virtual Int64 getSize() = 0;
+    virtual std::int64_t getSize() = 0;
 };
 
 } // namespace sf
@@ -123,13 +123,13 @@ public:
 ///
 ///     [[nodiscard]] bool open(const std::filesystem::path& filename);
 ///
-///     [[nodiscard]] Int64 read(void* data, Int64 size);
+///     [[nodiscard]] std::int64_t read(void* data, std::int64_t size);
 ///
-///     [[nodiscard]] Int64 seek(Int64 position);
+///     [[nodiscard]] std::int64_t seek(std::int64_t position);
 ///
-///     [[nodiscard]] Int64 tell();
+///     [[nodiscard]] std::int64_t tell();
 ///
-///     Int64 getSize();
+///     std::int64_t getSize();
 ///
 /// private:
 ///
diff --git a/include/SFML/System/MemoryInputStream.hpp b/include/SFML/System/MemoryInputStream.hpp
index 4dd0df5e..3112f66e 100644
--- a/include/SFML/System/MemoryInputStream.hpp
+++ b/include/SFML/System/MemoryInputStream.hpp
@@ -73,7 +73,7 @@ public:
     /// \return The number of bytes actually read, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] Int64 read(void* data, Int64 size) override;
+    [[nodiscard]] std::int64_t read(void* data, std::int64_t size) override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Change the current reading position
@@ -83,7 +83,7 @@ public:
     /// \return The position actually sought to, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] Int64 seek(Int64 position) override;
+    [[nodiscard]] std::int64_t seek(std::int64_t position) override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Get the current reading position in the stream
@@ -91,7 +91,7 @@ public:
     /// \return The current position, or -1 on error.
     ///
     ////////////////////////////////////////////////////////////
-    [[nodiscard]] Int64 tell() override;
+    [[nodiscard]] std::int64_t tell() override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Return the size of the stream
@@ -99,15 +99,15 @@ public:
     /// \return The total number of bytes available in the stream, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    Int64 getSize() override;
+    std::int64_t getSize() override;
 
 private:
     ////////////////////////////////////////////////////////////
     // Member data
     ////////////////////////////////////////////////////////////
-    const char* m_data;   //!< Pointer to the data in memory
-    Int64       m_size;   //!< Total size of the data
-    Int64       m_offset; //!< Current reading position
+    const char*  m_data;   //!< Pointer to the data in memory
+    std::int64_t m_size;   //!< Total size of the data
+    std::int64_t m_offset; //!< Current reading position
 };
 
 } // namespace sf
diff --git a/include/SFML/System/Time.hpp b/include/SFML/System/Time.hpp
index 44aa99d7..4654739a 100644
--- a/include/SFML/System/Time.hpp
+++ b/include/SFML/System/Time.hpp
@@ -85,7 +85,7 @@ public:
     /// \see asSeconds, asMilliseconds
     ///
     ////////////////////////////////////////////////////////////
-    constexpr Int64 asMicroseconds() const;
+    constexpr std::int64_t asMicroseconds() const;
 
     ////////////////////////////////////////////////////////////
     /// \brief Return the time value as a std::chorono::duration
@@ -112,7 +112,7 @@ public:
 private:
     friend constexpr Time seconds(float);
     friend constexpr Time milliseconds(std::int32_t);
-    friend constexpr Time microseconds(Int64);
+    friend constexpr Time microseconds(std::int64_t);
 
 private:
     ////////////////////////////////////////////////////////////
@@ -158,7 +158,7 @@ constexpr Time milliseconds(std::int32_t amount);
 /// \see seconds, milliseconds
 ///
 ////////////////////////////////////////////////////////////
-constexpr Time microseconds(Int64 amount);
+constexpr Time microseconds(std::int64_t amount);
 
 ////////////////////////////////////////////////////////////
 /// \relates Time
@@ -313,7 +313,7 @@ constexpr Time& operator-=(Time& left, Time right);
 /// \return \a left multiplied by \a right
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Time operator*(Time left, Int64 right);
+[[nodiscard]] constexpr Time operator*(Time left, std::int64_t right);
 
 ////////////////////////////////////////////////////////////
 /// \relates Time
@@ -337,7 +337,7 @@ constexpr Time& operator-=(Time& left, Time right);
 /// \return \a left multiplied by \a right
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Time operator*(Int64 left, Time right);
+[[nodiscard]] constexpr Time operator*(std::int64_t left, Time right);
 
 ////////////////////////////////////////////////////////////
 /// \relates Time
@@ -361,7 +361,7 @@ constexpr Time& operator*=(Time& left, float right);
 /// \return \a left multiplied by \a right
 ///
 ////////////////////////////////////////////////////////////
-constexpr Time& operator*=(Time& left, Int64 right);
+constexpr Time& operator*=(Time& left, std::int64_t right);
 
 ////////////////////////////////////////////////////////////
 /// \relates Time
@@ -385,7 +385,7 @@ constexpr Time& operator*=(Time& left, Int64 right);
 /// \return \a left divided by \a right
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Time operator/(Time left, Int64 right);
+[[nodiscard]] constexpr Time operator/(Time left, std::int64_t right);
 
 ////////////////////////////////////////////////////////////
 /// \relates Time
@@ -409,7 +409,7 @@ constexpr Time& operator/=(Time& left, float right);
 /// \return \a left divided by \a right
 ///
 ////////////////////////////////////////////////////////////
-constexpr Time& operator/=(Time& left, Int64 right);
+constexpr Time& operator/=(Time& left, std::int64_t right);
 
 ////////////////////////////////////////////////////////////
 /// \relates Time
@@ -485,7 +485,7 @@ constexpr Time& operator%=(Time& left, Time right);
 /// std::int32_t milli = t1.asMilliseconds(); // 100
 ///
 /// sf::Time t2 = sf::milliseconds(30);
-/// Int64 micro = t2.asMicroseconds(); // 30000
+/// std::int64_t micro = t2.asMicroseconds(); // 30000
 ///
 /// sf::Time t3 = sf::microseconds(-800000);
 /// float sec = t3.asSeconds(); // -0.8
diff --git a/include/SFML/System/Time.inl b/include/SFML/System/Time.inl
index f776490c..9dbc25a3 100644
--- a/include/SFML/System/Time.inl
+++ b/include/SFML/System/Time.inl
@@ -51,7 +51,7 @@ constexpr std::int32_t Time::asMilliseconds() const
 
 
 ////////////////////////////////////////////////////////////
-constexpr Int64 Time::asMicroseconds() const
+constexpr std::int64_t Time::asMicroseconds() const
 {
     return m_microseconds.count();
 }
@@ -87,7 +87,7 @@ constexpr Time milliseconds(std::int32_t amount)
 
 
 ////////////////////////////////////////////////////////////
-constexpr Time microseconds(Int64 amount)
+constexpr Time microseconds(std::int64_t amount)
 {
     return Time(std::chrono::microseconds(amount));
 }
@@ -178,7 +178,7 @@ constexpr Time operator*(Time left, float right)
 
 
 ////////////////////////////////////////////////////////////
-constexpr Time operator*(Time left, Int64 right)
+constexpr Time operator*(Time left, std::int64_t right)
 {
     return microseconds(left.asMicroseconds() * right);
 }
@@ -192,7 +192,7 @@ constexpr Time operator*(float left, Time right)
 
 
 ////////////////////////////////////////////////////////////
-constexpr Time operator*(Int64 left, Time right)
+constexpr Time operator*(std::int64_t left, Time right)
 {
     return right * left;
 }
@@ -206,7 +206,7 @@ constexpr Time& operator*=(Time& left, float right)
 
 
 ////////////////////////////////////////////////////////////
-constexpr Time& operator*=(Time& left, Int64 right)
+constexpr Time& operator*=(Time& left, std::int64_t right)
 {
     return left = left * right;
 }
@@ -220,7 +220,7 @@ constexpr Time operator/(Time left, float right)
 
 
 ////////////////////////////////////////////////////////////
-constexpr Time operator/(Time left, Int64 right)
+constexpr Time operator/(Time left, std::int64_t right)
 {
     return microseconds(left.asMicroseconds() / right);
 }
@@ -234,7 +234,7 @@ constexpr Time& operator/=(Time& left, float right)
 
 
 ////////////////////////////////////////////////////////////
-constexpr Time& operator/=(Time& left, Int64 right)
+constexpr Time& operator/=(Time& left, std::int64_t right)
 {
     return left = left / right;
 }
diff --git a/src/SFML/Audio/Music.cpp b/src/SFML/Audio/Music.cpp
index a0605396..f3d0d5f9 100644
--- a/src/SFML/Audio/Music.cpp
+++ b/src/SFML/Audio/Music.cpp
@@ -214,7 +214,7 @@ void Music::onSeek(Time timeOffset)
 
 
 ////////////////////////////////////////////////////////////
-Int64 Music::onLoop()
+std::int64_t Music::onLoop()
 {
     // Called by underlying SoundStream so we can determine where to loop.
     std::scoped_lock lock(m_mutex);
@@ -224,7 +224,7 @@ Int64 Music::onLoop()
         // Looping is enabled, and either we're at the loop end, or we're at the EOF
         // when it's equivalent to the loop end (loop end takes priority). Send us to loop begin
         m_file.seek(m_loopSpan.offset);
-        return static_cast<Int64>(m_file.getSampleOffset());
+        return static_cast<std::int64_t>(m_file.getSampleOffset());
     }
     else if (getLoop() && (currentOffset >= m_file.getSampleCount()))
     {
@@ -256,7 +256,7 @@ Uint64 Music::timeToSamples(Time position) const
     // Always ROUND, no unchecked truncation, hence the addition in the numerator.
     // This avoids most precision errors arising from "samples => Time => samples" conversions
     // Original rounding calculation is ((Micros * Freq * Channels) / 1000000) + 0.5
-    // We refactor it to keep Int64 as the data type throughout the whole operation.
+    // We refactor it to keep std::int64_t as the data type throughout the whole operation.
     return ((static_cast<Uint64>(position.asMicroseconds()) * getSampleRate() * getChannelCount()) + 500000) / 1000000;
 }
 
@@ -268,7 +268,7 @@ Time Music::samplesToTime(Uint64 samples) const
 
     // Make sure we don't divide by 0
     if (getSampleRate() != 0 && getChannelCount() != 0)
-        position = microseconds(static_cast<Int64>((samples * 1000000) / (getChannelCount() * getSampleRate())));
+        position = microseconds(static_cast<std::int64_t>((samples * 1000000) / (getChannelCount() * getSampleRate())));
 
     return position;
 }
diff --git a/src/SFML/Audio/SoundFileReaderFlac.cpp b/src/SFML/Audio/SoundFileReaderFlac.cpp
index d70ddda3..36659b32 100644
--- a/src/SFML/Audio/SoundFileReaderFlac.cpp
+++ b/src/SFML/Audio/SoundFileReaderFlac.cpp
@@ -39,7 +39,7 @@ FLAC__StreamDecoderReadStatus streamRead(const FLAC__StreamDecoder*, FLAC__byte
 {
     auto* data = static_cast<sf::priv::SoundFileReaderFlac::ClientData*>(clientData);
 
-    sf::Int64 count = data->stream->read(buffer, static_cast<sf::Int64>(*bytes));
+    std::int64_t count = data->stream->read(buffer, static_cast<std::int64_t>(*bytes));
     if (count > 0)
     {
         *bytes = static_cast<std::size_t>(count);
@@ -59,7 +59,7 @@ FLAC__StreamDecoderSeekStatus streamSeek(const FLAC__StreamDecoder*, FLAC__uint6
 {
     auto* data = static_cast<sf::priv::SoundFileReaderFlac::ClientData*>(clientData);
 
-    sf::Int64 position = data->stream->seek(static_cast<sf::Int64>(absoluteByteOffset));
+    std::int64_t position = data->stream->seek(static_cast<std::int64_t>(absoluteByteOffset));
     if (position >= 0)
         return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
     else
@@ -70,7 +70,7 @@ FLAC__StreamDecoderTellStatus streamTell(const FLAC__StreamDecoder*, FLAC__uint6
 {
     auto* data = static_cast<sf::priv::SoundFileReaderFlac::ClientData*>(clientData);
 
-    sf::Int64 position = data->stream->tell();
+    std::int64_t position = data->stream->tell();
     if (position >= 0)
     {
         *absoluteByteOffset = static_cast<FLAC__uint64>(position);
@@ -86,7 +86,7 @@ FLAC__StreamDecoderLengthStatus streamLength(const FLAC__StreamDecoder*, FLAC__u
 {
     auto* data = static_cast<sf::priv::SoundFileReaderFlac::ClientData*>(clientData);
 
-    sf::Int64 count = data->stream->getSize();
+    std::int64_t count = data->stream->getSize();
     if (count >= 0)
     {
         *streamLength = static_cast<FLAC__uint64>(count);
diff --git a/src/SFML/Audio/SoundFileReaderMp3.cpp b/src/SFML/Audio/SoundFileReaderMp3.cpp
index 3f0b3d95..9051eb01 100644
--- a/src/SFML/Audio/SoundFileReaderMp3.cpp
+++ b/src/SFML/Audio/SoundFileReaderMp3.cpp
@@ -57,13 +57,13 @@ namespace
 std::size_t readCallback(void* ptr, std::size_t size, void* data)
 {
     sf::InputStream* stream = static_cast<sf::InputStream*>(data);
-    return static_cast<std::size_t>(stream->read(ptr, static_cast<sf::Int64>(size)));
+    return static_cast<std::size_t>(stream->read(ptr, static_cast<std::int64_t>(size)));
 }
 
 int seekCallback(std::uint64_t offset, void* data)
 {
     sf::InputStream* stream   = static_cast<sf::InputStream*>(data);
-    sf::Int64        position = stream->seek(static_cast<sf::Int64>(offset));
+    std::int64_t     position = stream->seek(static_cast<std::int64_t>(offset));
     return position < 0 ? -1 : 0;
 }
 
@@ -83,7 +83,7 @@ bool SoundFileReaderMp3::check(InputStream& stream)
 {
     std::uint8_t header[10];
 
-    if (static_cast<std::size_t>(stream.read(header, static_cast<Int64>(sizeof(header)))) < sizeof(header))
+    if (static_cast<std::size_t>(stream.read(header, static_cast<std::int64_t>(sizeof(header)))) < sizeof(header))
         return false;
 
     if (hasValidId3Tag(header))
diff --git a/src/SFML/Audio/SoundFileReaderOgg.cpp b/src/SFML/Audio/SoundFileReaderOgg.cpp
index a197a066..04d9144f 100644
--- a/src/SFML/Audio/SoundFileReaderOgg.cpp
+++ b/src/SFML/Audio/SoundFileReaderOgg.cpp
@@ -39,7 +39,7 @@ namespace
 std::size_t read(void* ptr, std::size_t size, std::size_t nmemb, void* data)
 {
     auto* stream = static_cast<sf::InputStream*>(data);
-    return static_cast<std::size_t>(stream->read(ptr, static_cast<sf::Int64>(size * nmemb)));
+    return static_cast<std::size_t>(stream->read(ptr, static_cast<std::int64_t>(size * nmemb)));
 }
 
 int seek(void* data, ogg_int64_t offset, int whence)
diff --git a/src/SFML/Audio/SoundFileReaderWav.cpp b/src/SFML/Audio/SoundFileReaderWav.cpp
index 172bd90f..05a75b9b 100644
--- a/src/SFML/Audio/SoundFileReaderWav.cpp
+++ b/src/SFML/Audio/SoundFileReaderWav.cpp
@@ -49,7 +49,7 @@ bool decode(sf::InputStream& stream, std::uint8_t& value)
 bool decode(sf::InputStream& stream, std::int16_t& value)
 {
     unsigned char bytes[sizeof(value)];
-    if (static_cast<std::size_t>(stream.read(bytes, static_cast<sf::Int64>(sizeof(bytes)))) != sizeof(bytes))
+    if (static_cast<std::size_t>(stream.read(bytes, static_cast<std::int64_t>(sizeof(bytes)))) != sizeof(bytes))
         return false;
 
     value = static_cast<std::int16_t>(bytes[0] | (bytes[1] << 8));
@@ -60,7 +60,7 @@ bool decode(sf::InputStream& stream, std::int16_t& value)
 bool decode(sf::InputStream& stream, std::uint16_t& value)
 {
     unsigned char bytes[sizeof(value)];
-    if (static_cast<std::size_t>(stream.read(bytes, static_cast<sf::Int64>(sizeof(bytes)))) != sizeof(bytes))
+    if (static_cast<std::size_t>(stream.read(bytes, static_cast<std::int64_t>(sizeof(bytes)))) != sizeof(bytes))
         return false;
 
     value = static_cast<std::uint16_t>(bytes[0] | (bytes[1] << 8));
@@ -71,7 +71,7 @@ bool decode(sf::InputStream& stream, std::uint16_t& value)
 bool decode24bit(sf::InputStream& stream, std::uint32_t& value)
 {
     unsigned char bytes[3];
-    if (static_cast<std::size_t>(stream.read(bytes, static_cast<sf::Int64>(sizeof(bytes)))) != sizeof(bytes))
+    if (static_cast<std::size_t>(stream.read(bytes, static_cast<std::int64_t>(sizeof(bytes)))) != sizeof(bytes))
         return false;
 
     value = static_cast<std::uint32_t>(bytes[0] | (bytes[1] << 8) | (bytes[2] << 16));
@@ -82,7 +82,7 @@ bool decode24bit(sf::InputStream& stream, std::uint32_t& value)
 bool decode(sf::InputStream& stream, std::uint32_t& value)
 {
     unsigned char bytes[sizeof(value)];
-    if (static_cast<std::size_t>(stream.read(bytes, static_cast<sf::Int64>(sizeof(bytes)))) != sizeof(bytes))
+    if (static_cast<std::size_t>(stream.read(bytes, static_cast<std::int64_t>(sizeof(bytes)))) != sizeof(bytes))
         return false;
 
     value = static_cast<std::uint32_t>(bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24));
@@ -109,7 +109,7 @@ namespace priv
 bool SoundFileReaderWav::check(InputStream& stream)
 {
     char header[mainChunkSize];
-    if (stream.read(header, sizeof(header)) < static_cast<Int64>(sizeof(header)))
+    if (stream.read(header, sizeof(header)) < static_cast<std::int64_t>(sizeof(header)))
         return false;
 
     return (header[0] == 'R') && (header[1] == 'I') && (header[2] == 'F') && (header[3] == 'F') && (header[8] == 'W') &&
@@ -143,7 +143,7 @@ void SoundFileReaderWav::seek(Uint64 sampleOffset)
 {
     assert(m_stream);
 
-    if (m_stream->seek(static_cast<Int64>(m_dataStart + sampleOffset * m_bytesPerSample) == -1))
+    if (m_stream->seek(static_cast<std::int64_t>(m_dataStart + sampleOffset * m_bytesPerSample) == -1))
         err() << "Failed to seek WAV sound stream" << std::endl;
 }
 
@@ -224,7 +224,8 @@ bool SoundFileReaderWav::parseHeader(Info& info)
     // If we are here, it means that the first part of the header
     // (the format) has already been checked
     char mainChunk[mainChunkSize];
-    if (static_cast<std::size_t>(m_stream->read(mainChunk, static_cast<Int64>(sizeof(mainChunk)))) != sizeof(mainChunk))
+    if (static_cast<std::size_t>(m_stream->read(mainChunk, static_cast<std::int64_t>(sizeof(mainChunk)))) !=
+        sizeof(mainChunk))
         return false;
 
     // Parse all the sub-chunks
@@ -233,13 +234,13 @@ bool SoundFileReaderWav::parseHeader(Info& info)
     {
         // Parse the sub-chunk id and size
         char subChunkId[4];
-        if (static_cast<std::size_t>(m_stream->read(subChunkId, static_cast<Int64>(sizeof(subChunkId)))) !=
+        if (static_cast<std::size_t>(m_stream->read(subChunkId, static_cast<std::int64_t>(sizeof(subChunkId)))) !=
             sizeof(subChunkId))
             return false;
         std::uint32_t subChunkSize = 0;
         if (!decode(*m_stream, subChunkSize))
             return false;
-        Int64 subChunkStart = m_stream->tell();
+        std::int64_t subChunkStart = m_stream->tell();
         if (subChunkStart == -1)
             return false;
 
@@ -308,7 +309,7 @@ bool SoundFileReaderWav::parseHeader(Info& info)
 
                 // Subformat
                 char subformat[16];
-                if (static_cast<std::size_t>(m_stream->read(subformat, static_cast<Int64>(sizeof(subformat)))) !=
+                if (static_cast<std::size_t>(m_stream->read(subformat, static_cast<std::int64_t>(sizeof(subformat)))) !=
                     sizeof(subformat))
                     return false;
 
diff --git a/src/SFML/Audio/SoundStream.cpp b/src/SFML/Audio/SoundStream.cpp
index 14486235..385911c4 100644
--- a/src/SFML/Audio/SoundStream.cpp
+++ b/src/SFML/Audio/SoundStream.cpp
@@ -260,7 +260,7 @@ bool SoundStream::getLoop() const
 
 
 ////////////////////////////////////////////////////////////
-Int64 SoundStream::onLoop()
+std::int64_t SoundStream::onLoop()
 {
     onSeek(Time::Zero);
     return 0;
@@ -290,7 +290,7 @@ void SoundStream::streamData()
 
     // Create the buffers
     alCheck(alGenBuffers(BufferCount, m_buffers));
-    for (Int64& bufferSeek : m_bufferSeeks)
+    for (std::int64_t& bufferSeek : m_bufferSeeks)
         bufferSeek = NoLoop;
 
     // Fill the queue
diff --git a/src/SFML/Graphics/Font.cpp b/src/SFML/Graphics/Font.cpp
index b181f7ed..b4f58fbd 100644
--- a/src/SFML/Graphics/Font.cpp
+++ b/src/SFML/Graphics/Font.cpp
@@ -53,12 +53,13 @@ namespace
 // FreeType callbacks that operate on a sf::InputStream
 unsigned long read(FT_Stream rec, unsigned long offset, unsigned char* buffer, unsigned long count)
 {
-    auto  convertedOffset = static_cast<sf::Int64>(offset);
+    auto  convertedOffset = static_cast<std::int64_t>(offset);
     auto* stream          = static_cast<sf::InputStream*>(rec->descriptor.pointer);
     if (stream->seek(convertedOffset) == convertedOffset)
     {
         if (count > 0)
-            return static_cast<unsigned long>(stream->read(reinterpret_cast<char*>(buffer), static_cast<sf::Int64>(count)));
+            return static_cast<unsigned long>(
+                stream->read(reinterpret_cast<char*>(buffer), static_cast<std::int64_t>(count)));
         else
             return 0;
     }
diff --git a/src/SFML/Graphics/Shader.cpp b/src/SFML/Graphics/Shader.cpp
index 9a6d4cfc..210cf7d4 100644
--- a/src/SFML/Graphics/Shader.cpp
+++ b/src/SFML/Graphics/Shader.cpp
@@ -102,8 +102,8 @@ bool getFileContents(const std::filesystem::path& filename, std::vector<char>& b
 // Read the contents of a stream into an array of char
 bool getStreamContents(sf::InputStream& stream, std::vector<char>& buffer)
 {
-    bool      success = true;
-    sf::Int64 size    = stream.getSize();
+    bool         success = true;
+    std::int64_t size    = stream.getSize();
     if (size > 0)
     {
         buffer.resize(static_cast<std::size_t>(size));
@@ -114,8 +114,8 @@ bool getStreamContents(sf::InputStream& stream, std::vector<char>& buffer)
             return false;
         }
 
-        sf::Int64 read = stream.read(buffer.data(), size);
-        success        = (read == size);
+        std::int64_t read = stream.read(buffer.data(), size);
+        success           = (read == size);
     }
     buffer.push_back('\0');
     return success;
diff --git a/src/SFML/Network/Packet.cpp b/src/SFML/Network/Packet.cpp
index 15bc1659..d1a8bb5b 100644
--- a/src/SFML/Network/Packet.cpp
+++ b/src/SFML/Network/Packet.cpp
@@ -211,7 +211,7 @@ Packet& Packet::operator>>(std::uint32_t& data)
 
 
 ////////////////////////////////////////////////////////////
-Packet& Packet::operator>>(Int64& data)
+Packet& Packet::operator>>(std::int64_t& data)
 {
     if (checkSize(sizeof(data)))
     {
@@ -220,10 +220,10 @@ Packet& Packet::operator>>(Int64& data)
         std::uint8_t bytes[sizeof(data)];
         std::memcpy(bytes, &m_data[m_readPos], sizeof(data));
 
-        data = (static_cast<Int64>(bytes[0]) << 56) | (static_cast<Int64>(bytes[1]) << 48) |
-               (static_cast<Int64>(bytes[2]) << 40) | (static_cast<Int64>(bytes[3]) << 32) |
-               (static_cast<Int64>(bytes[4]) << 24) | (static_cast<Int64>(bytes[5]) << 16) |
-               (static_cast<Int64>(bytes[6]) << 8) | (static_cast<Int64>(bytes[7]));
+        data = (static_cast<std::int64_t>(bytes[0]) << 56) | (static_cast<std::int64_t>(bytes[1]) << 48) |
+               (static_cast<std::int64_t>(bytes[2]) << 40) | (static_cast<std::int64_t>(bytes[3]) << 32) |
+               (static_cast<std::int64_t>(bytes[4]) << 24) | (static_cast<std::int64_t>(bytes[5]) << 16) |
+               (static_cast<std::int64_t>(bytes[6]) << 8) | (static_cast<std::int64_t>(bytes[7]));
 
         m_readPos += sizeof(data);
     }
@@ -452,7 +452,7 @@ Packet& Packet::operator<<(std::uint32_t data)
 
 
 ////////////////////////////////////////////////////////////
-Packet& Packet::operator<<(Int64 data)
+Packet& Packet::operator<<(std::int64_t data)
 {
     // Since htonll is not available everywhere, we have to convert
     // to network byte order (big endian) manually
diff --git a/src/SFML/System/Android/ResourceStream.cpp b/src/SFML/System/Android/ResourceStream.cpp
index 443d14f6..b686837e 100644
--- a/src/SFML/System/Android/ResourceStream.cpp
+++ b/src/SFML/System/Android/ResourceStream.cpp
@@ -57,7 +57,7 @@ ResourceStream::~ResourceStream()
 
 
 ////////////////////////////////////////////////////////////
-Int64 ResourceStream::read(void* data, Int64 size)
+std::int64_t ResourceStream::read(void* data, std::int64_t size)
 {
     if (m_file)
     {
@@ -71,7 +71,7 @@ Int64 ResourceStream::read(void* data, Int64 size)
 
 
 ////////////////////////////////////////////////////////////
-Int64 ResourceStream::seek(Int64 position)
+std::int64_t ResourceStream::seek(std::int64_t position)
 {
     if (m_file)
     {
@@ -85,7 +85,7 @@ Int64 ResourceStream::seek(Int64 position)
 
 
 ////////////////////////////////////////////////////////////
-Int64 ResourceStream::tell()
+std::int64_t ResourceStream::tell()
 {
     if (m_file)
     {
@@ -99,7 +99,7 @@ Int64 ResourceStream::tell()
 
 
 ////////////////////////////////////////////////////////////
-Int64 ResourceStream::getSize()
+std::int64_t ResourceStream::getSize()
 {
     if (m_file)
     {
diff --git a/src/SFML/System/Android/ResourceStream.hpp b/src/SFML/System/Android/ResourceStream.hpp
index da559fd0..d2f95ec2 100644
--- a/src/SFML/System/Android/ResourceStream.hpp
+++ b/src/SFML/System/Android/ResourceStream.hpp
@@ -72,7 +72,7 @@ public:
     /// \return The number of bytes actually read, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    Int64 read(void* data, Int64 size) override;
+    std::int64_t read(void* data, std::int64_t size) override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Change the current reading position in the asset file
@@ -82,7 +82,7 @@ public:
     /// \return The position actually sought to, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    Int64 seek(Int64 position) override;
+    std::int64_t seek(std::int64_t position) override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Get the current reading position in the asset file
@@ -90,7 +90,7 @@ public:
     /// \return The current position, or -1 on error.
     ///
     ////////////////////////////////////////////////////////////
-    Int64 tell() override;
+    std::int64_t tell() override;
 
     ////////////////////////////////////////////////////////////
     /// \brief Return the size of the asset file
@@ -98,7 +98,7 @@ public:
     /// \return The total number of bytes available in the asset, or -1 on error
     ///
     ////////////////////////////////////////////////////////////
-    Int64 getSize() override;
+    std::int64_t getSize() override;
 
 private:
     ////////////////////////////////////////////////////////////
diff --git a/src/SFML/System/FileInputStream.cpp b/src/SFML/System/FileInputStream.cpp
index a928ec84..2f919ec2 100644
--- a/src/SFML/System/FileInputStream.cpp
+++ b/src/SFML/System/FileInputStream.cpp
@@ -77,13 +77,13 @@ bool FileInputStream::open(const std::filesystem::path& filename)
 
 
 ////////////////////////////////////////////////////////////
-Int64 FileInputStream::read(void* data, Int64 size)
+std::int64_t FileInputStream::read(void* data, std::int64_t size)
 {
 #ifdef SFML_SYSTEM_ANDROID
     return m_file->read(data, size);
 #else
     if (m_file)
-        return static_cast<Int64>(std::fread(data, 1, static_cast<std::size_t>(size), m_file.get()));
+        return static_cast<std::int64_t>(std::fread(data, 1, static_cast<std::size_t>(size), m_file.get()));
     else
         return -1;
 #endif
@@ -91,7 +91,7 @@ Int64 FileInputStream::read(void* data, Int64 size)
 
 
 ////////////////////////////////////////////////////////////
-Int64 FileInputStream::seek(Int64 position)
+std::int64_t FileInputStream::seek(std::int64_t position)
 {
 #ifdef SFML_SYSTEM_ANDROID
     return m_file->seek(position);
@@ -112,7 +112,7 @@ Int64 FileInputStream::seek(Int64 position)
 
 
 ////////////////////////////////////////////////////////////
-Int64 FileInputStream::tell()
+std::int64_t FileInputStream::tell()
 {
 #ifdef SFML_SYSTEM_ANDROID
     return m_file->tell();
@@ -126,16 +126,16 @@ Int64 FileInputStream::tell()
 
 
 ////////////////////////////////////////////////////////////
-Int64 FileInputStream::getSize()
+std::int64_t FileInputStream::getSize()
 {
 #ifdef SFML_SYSTEM_ANDROID
     return m_file->getSize();
 #else
     if (m_file)
     {
-        Int64 position = tell();
+        std::int64_t position = tell();
         std::fseek(m_file.get(), 0, SEEK_END);
-        Int64 size = tell();
+        std::int64_t size = tell();
 
         if (seek(position) == -1)
             return -1;
diff --git a/src/SFML/System/MemoryInputStream.cpp b/src/SFML/System/MemoryInputStream.cpp
index 3a8720e0..2c7299ab 100644
--- a/src/SFML/System/MemoryInputStream.cpp
+++ b/src/SFML/System/MemoryInputStream.cpp
@@ -42,19 +42,19 @@ MemoryInputStream::MemoryInputStream() : m_data(nullptr), m_size(0), m_offset(0)
 void MemoryInputStream::open(const void* data, std::size_t sizeInBytes)
 {
     m_data   = static_cast<const char*>(data);
-    m_size   = static_cast<Int64>(sizeInBytes);
+    m_size   = static_cast<std::int64_t>(sizeInBytes);
     m_offset = 0;
 }
 
 
 ////////////////////////////////////////////////////////////
-Int64 MemoryInputStream::read(void* data, Int64 size)
+std::int64_t MemoryInputStream::read(void* data, std::int64_t size)
 {
     if (!m_data)
         return -1;
 
-    Int64 endPosition = m_offset + size;
-    Int64 count       = endPosition <= m_size ? size : m_size - m_offset;
+    std::int64_t endPosition = m_offset + size;
+    std::int64_t count       = endPosition <= m_size ? size : m_size - m_offset;
 
     if (count > 0)
     {
@@ -67,7 +67,7 @@ Int64 MemoryInputStream::read(void* data, Int64 size)
 
 
 ////////////////////////////////////////////////////////////
-Int64 MemoryInputStream::seek(Int64 position)
+std::int64_t MemoryInputStream::seek(std::int64_t position)
 {
     if (!m_data)
         return -1;
@@ -78,7 +78,7 @@ Int64 MemoryInputStream::seek(Int64 position)
 
 
 ////////////////////////////////////////////////////////////
-Int64 MemoryInputStream::tell()
+std::int64_t MemoryInputStream::tell()
 {
     if (!m_data)
         return -1;
@@ -88,7 +88,7 @@ Int64 MemoryInputStream::tell()
 
 
 ////////////////////////////////////////////////////////////
-Int64 MemoryInputStream::getSize()
+std::int64_t MemoryInputStream::getSize()
 {
     if (!m_data)
         return -1;
diff --git a/src/SFML/System/Unix/SleepImpl.cpp b/src/SFML/System/Unix/SleepImpl.cpp
index 9446377d..51827dbb 100644
--- a/src/SFML/System/Unix/SleepImpl.cpp
+++ b/src/SFML/System/Unix/SleepImpl.cpp
@@ -37,7 +37,7 @@ namespace sf::priv
 ////////////////////////////////////////////////////////////
 void sleepImpl(Time time)
 {
-    const Int64 usecs = time.asMicroseconds();
+    const std::int64_t usecs = time.asMicroseconds();
 
     // Construct the time to wait
     timespec ti;
diff --git a/src/SFML/Window/Android/WindowImplAndroid.cpp b/src/SFML/Window/Android/WindowImplAndroid.cpp
index 141238c0..6a2dda8d 100644
--- a/src/SFML/Window/Android/WindowImplAndroid.cpp
+++ b/src/SFML/Window/Android/WindowImplAndroid.cpp
@@ -341,8 +341,8 @@ int WindowImplAndroid::processScrollEvent(AInputEvent* _event, ActivityStates& s
     }
 
     // Retrieve everything we need to create this MotionEvent in Java
-    Int64        downTime   = AMotionEvent_getDownTime(_event);
-    Int64        eventTime  = AMotionEvent_getEventTime(_event);
+    std::int64_t downTime   = AMotionEvent_getDownTime(_event);
+    std::int64_t eventTime  = AMotionEvent_getEventTime(_event);
     std::int32_t action     = AMotionEvent_getAction(_event);
     float        x          = AMotionEvent_getX(_event, 0);
     float        y          = AMotionEvent_getY(_event, 0);
diff --git a/test/Network/Packet.cpp b/test/Network/Packet.cpp
index 4a693532..fc8d1f1a 100644
--- a/test/Network/Packet.cpp
+++ b/test/Network/Packet.cpp
@@ -42,12 +42,12 @@ TEST_CASE("sf::Packet class - [network]")
             testPacketStreamOperators(std::numeric_limits<std::int32_t>::max());
         }
 
-        SUBCASE("Int64")
+        SUBCASE("std::int64_t")
         {
-            testPacketStreamOperators(sf::Int64(0));
-            testPacketStreamOperators(sf::Int64(1));
-            testPacketStreamOperators(std::numeric_limits<sf::Int64>::min());
-            testPacketStreamOperators(std::numeric_limits<sf::Int64>::max());
+            testPacketStreamOperators(std::int64_t(0));
+            testPacketStreamOperators(std::int64_t(1));
+            testPacketStreamOperators(std::numeric_limits<std::int64_t>::min());
+            testPacketStreamOperators(std::numeric_limits<std::int64_t>::max());
         }
     }
 }
diff --git a/test/System/Config.cpp b/test/System/Config.cpp
index 5443a601..61c1df28 100644
--- a/test/System/Config.cpp
+++ b/test/System/Config.cpp
@@ -14,7 +14,6 @@ TEST_CASE("SFML/Config.hpp")
 
     SUBCASE("Fixed width types")
     {
-        CHECK(sizeof(sf::Int64) == 8);
         CHECK(sizeof(sf::Uint64) == 8);
     }
 }
diff --git a/test/System/Time.cpp b/test/System/Time.cpp
index b5f1642f..092f0155 100644
--- a/test/System/Time.cpp
+++ b/test/System/Time.cpp
@@ -236,18 +236,18 @@ TEST_CASE("sf::Time class - [system]")
         {
             CHECK(sf::seconds(1) * 2.0f == sf::seconds(2));
             CHECK(sf::seconds(12) * 0.5f == sf::seconds(6));
-            CHECK(sf::seconds(1) * static_cast<sf::Int64>(2) == sf::seconds(2));
-            CHECK(sf::seconds(42) * static_cast<sf::Int64>(2) == sf::seconds(84));
+            CHECK(sf::seconds(1) * static_cast<std::int64_t>(2) == sf::seconds(2));
+            CHECK(sf::seconds(42) * static_cast<std::int64_t>(2) == sf::seconds(84));
             CHECK(2.0f * sf::seconds(1) == sf::seconds(2));
             CHECK(0.5f * sf::seconds(12) == sf::seconds(6));
-            CHECK(static_cast<sf::Int64>(2) * sf::seconds(1) == sf::seconds(2));
-            CHECK(static_cast<sf::Int64>(2) * sf::seconds(42) == sf::seconds(84));
+            CHECK(static_cast<std::int64_t>(2) * sf::seconds(1) == sf::seconds(2));
+            CHECK(static_cast<std::int64_t>(2) * sf::seconds(42) == sf::seconds(84));
         }
 
         SUBCASE("operator*=")
         {
             sf::Time time = sf::milliseconds(1'000);
-            time *= static_cast<sf::Int64>(10);
+            time *= static_cast<std::int64_t>(10);
             CHECK(time == sf::milliseconds(10'000));
             time *= 0.1f;
             CHECK(time.asMilliseconds() == 1'000);
@@ -257,8 +257,8 @@ TEST_CASE("sf::Time class - [system]")
         {
             CHECK(sf::seconds(1) / 2.0f == sf::seconds(0.5f));
             CHECK(sf::seconds(12) / 0.5f == sf::seconds(24));
-            CHECK(sf::seconds(1) / static_cast<sf::Int64>(2) == sf::seconds(0.5f));
-            CHECK(sf::seconds(42) / static_cast<sf::Int64>(2) == sf::seconds(21));
+            CHECK(sf::seconds(1) / static_cast<std::int64_t>(2) == sf::seconds(0.5f));
+            CHECK(sf::seconds(42) / static_cast<std::int64_t>(2) == sf::seconds(21));
             CHECK(sf::seconds(1) / sf::seconds(1) == 1.0f);
             CHECK(sf::milliseconds(10) / sf::microseconds(1) == Approx(10'000.f));
         }
@@ -266,7 +266,7 @@ TEST_CASE("sf::Time class - [system]")
         SUBCASE("operator/=")
         {
             sf::Time time = sf::milliseconds(1'000);
-            time /= static_cast<sf::Int64>(2);
+            time /= static_cast<std::int64_t>(2);
             CHECK(time == sf::milliseconds(500));
             time /= 0.5f;
             CHECK(time.asMilliseconds() == 1'000);