diff --git a/CMakeLists.txt b/CMakeLists.txt
index c98f5cf..46cc974 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.25)
 include(FetchContent)
 
-set(BLT_GRAPHICS_VERSION 1.1.6)
+set(BLT_GRAPHICS_VERSION 1.1.7)
 set(BLT_GRAPHICS_TEST_VERSION 0.0.1)
 
 project(BLT_WITH_GRAPHICS VERSION ${BLT_GRAPHICS_VERSION})
diff --git a/include/blt/gfx/model.h b/include/blt/gfx/model.h
index 9bd30de..2de89af 100644
--- a/include/blt/gfx/model.h
+++ b/include/blt/gfx/model.h
@@ -61,9 +61,9 @@ namespace blt::gfx
                 allocate(size, mem_type, static_cast<const void*>(data));
             }
             
-            void sub_update(GLsizeiptr offset, GLsizeiptr size, void* data) const;
+            void sub_update(GLsizeiptr offset, GLsizeiptr size, const void* data) const;
             
-            void update(GLsizeiptr size, void* data);
+            void update(GLsizeiptr size, const void* data);
             
             void destroy();
     };
diff --git a/src/blt/gfx/model.cpp b/src/blt/gfx/model.cpp
index d72c93e..f3f9389 100644
--- a/src/blt/gfx/model.cpp
+++ b/src/blt/gfx/model.cpp
@@ -84,7 +84,7 @@ namespace blt::gfx
         memory_type = mem_type;
     }
     
-    void vertex_buffer_t::update(GLsizeiptr size, void* data)
+    void vertex_buffer_t::update(GLsizeiptr size, const void* data)
     {
         if (size <= size_)
             sub_update(0, size, data);
@@ -93,7 +93,7 @@ namespace blt::gfx
         size_ = size;
     }
     
-    void vertex_buffer_t::sub_update(GLsizeiptr offset, GLsizeiptr size, void* data) const
+    void vertex_buffer_t::sub_update(GLsizeiptr offset, GLsizeiptr size, const void* data) const
     {
         bind();
         glBufferSubData(buffer_type, offset, size, data);