diff --git a/src/core/graphics/glext.h b/src/core/graphics/glext.h
index ee306e1..44e9805 100755
--- a/src/core/graphics/glext.h
+++ b/src/core/graphics/glext.h
@@ -51,7 +51,7 @@ extern "C" {
 #define GLAPI extern
 #endif
 
-#define GL_GLEXT_VERSION 20180221
+#define GL_GLEXT_VERSION 20190805
 
 /* Generated C header for:
  * API: gl
@@ -465,8 +465,8 @@ GLAPI void APIENTRY glBlendEquation (GLenum mode);
 #ifndef GL_VERSION_1_5
 #define GL_VERSION_1_5 1
 #include <stddef.h>
-typedef ptrdiff_t GLsizeiptr;
-typedef ptrdiff_t GLintptr;
+typedef khronos_ssize_t GLsizeiptr;
+typedef khronos_intptr_t GLintptr;
 #define GL_BUFFER_SIZE                    0x8764
 #define GL_BUFFER_USAGE                   0x8765
 #define GL_QUERY_COUNTER_BITS             0x8864