diff --git a/include/Athena/FileWriter.hpp b/include/Athena/FileWriter.hpp
index b0c7ff9..3f65cf0 100644
--- a/include/Athena/FileWriter.hpp
+++ b/include/Athena/FileWriter.hpp
@@ -31,8 +31,8 @@ public:
     void seekBit(int bit);
     void writeUByte(atUint8 val);
     void writeByte(atInt8 val);
-    void writeUBytes(atUint8* data, atUint64 len);
-    void writeBytes(atInt8* data, atUint64 len);
+    void writeUBytes(const atUint8* data, atUint64 len);
+    void writeBytes(const atInt8* data, atUint64 len);
     void writeUint16(atUint16 val);
     void writeInt16(atInt16 val);
     void writeUint32(atUint32 val);
diff --git a/include/Athena/IStreamWriter.hpp b/include/Athena/IStreamWriter.hpp
index 3ef8514..6f7dc23 100644
--- a/include/Athena/IStreamWriter.hpp
+++ b/include/Athena/IStreamWriter.hpp
@@ -25,8 +25,8 @@ public:
     virtual void writeBit(bool) = 0;
     virtual void writeUByte(atUint8) = 0;
     virtual void writeByte(atInt8) = 0;
-    virtual void writeUBytes(atUint8*, atUint64) = 0;
-    virtual void writeBytes(atInt8*, atUint64) = 0;
+    virtual void writeUBytes(const atUint8*, atUint64) = 0;
+    virtual void writeBytes(const atInt8*, atUint64) = 0;
     virtual void writeUint16(atUint16) = 0;
     virtual void writeInt16(atInt16) = 0;
     virtual void writeUint32(atUint32) = 0;
diff --git a/include/Athena/MemoryWriter.hpp b/include/Athena/MemoryWriter.hpp
index f1862a8..5778aae 100644
--- a/include/Athena/MemoryWriter.hpp
+++ b/include/Athena/MemoryWriter.hpp
@@ -164,7 +164,7 @@ public:
      * \param data The buffer to write
      * \param length The amount to write
      */
-    void writeUBytes(atUint8* data, atUint64 len);
+    void writeUBytes(const atUint8* data, atUint64 len);
 
     /*! \brief Writes the given buffer with the specified length, buffers can be bigger than the length
      *  however it's undefined behavior to try and write a buffer which is smaller than the given length.
@@ -172,7 +172,7 @@ public:
      * \param data The buffer to write
      * \param length The amount to write
      */
-    void writeBytes(atInt8* data, atUint64 len);
+    void writeBytes(const atInt8* data, atUint64 len);
 
     /*! \brief Writes an Int16 to the buffer and advances the buffer.
      *         It also swaps the bytes depending on the platform and Stream settings.
diff --git a/src/Athena/FileWriter.cpp b/src/Athena/FileWriter.cpp
index b8a03af..cccce04 100644
--- a/src/Athena/FileWriter.cpp
+++ b/src/Athena/FileWriter.cpp
@@ -155,7 +155,7 @@ void FileWriter::writeByte(atInt8 val)
     writeUByte(val);
 }
 
-void FileWriter::writeUBytes(atUint8* data, atUint64 len)
+void FileWriter::writeUBytes(const atUint8* data, atUint64 len)
 {
     if (!isOpen())
         THROW_INVALID_OPERATION_EXCEPTION("File not open for writing");
@@ -166,7 +166,7 @@ void FileWriter::writeUBytes(atUint8* data, atUint64 len)
         THROW_IO_EXCEPTION("Unable to write to stream");
 }
 
-void FileWriter::writeBytes(atInt8* data, atUint64 len)
+void FileWriter::writeBytes(const atInt8* data, atUint64 len)
 {
     writeUBytes((atUint8*)data, len);
 }
diff --git a/src/Athena/MemoryWriter.cpp b/src/Athena/MemoryWriter.cpp
index d5c5ed6..cfb2c55 100644
--- a/src/Athena/MemoryWriter.cpp
+++ b/src/Athena/MemoryWriter.cpp
@@ -254,7 +254,7 @@ void MemoryWriter::writeByte(atInt8 val)
     writeUByte(val);
 }
 
-void MemoryWriter::writeUBytes(atUint8* data, atUint64 length)
+void MemoryWriter::writeUBytes(const atUint8* data, atUint64 length)
 {
     if (!isOpen())
         resize(sizeof(atUint8) * length);
@@ -276,7 +276,7 @@ void MemoryWriter::writeUBytes(atUint8* data, atUint64 length)
     m_position += length;
 }
 
-void MemoryWriter::writeBytes(atInt8* data, atUint64 length)
+void MemoryWriter::writeBytes(const atInt8* data, atUint64 length)
 {
     writeUBytes((atUint8*)data, length);
 }