diff --git a/CMakeLists.txt b/CMakeLists.txt
index 59d7038..9ebaa8f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,8 @@ find_package(pybind11 CONFIG REQUIRED)
 
 pybind11_add_module(${PROJECT_NAME}  ${SRC})
 
-add_subdirectory(glfw)
+add_subdirectory( ${PROJECT_SOURCE_DIR}/glew/build/cmake )
+add_subdirectory( ${PROJECT_SOURCE_DIR}/glfw )
 target_link_libraries(${PROJECT_NAME} PRIVATE glfw)
 find_package(OpenGl REQUIRED)
 target_include_directories(${PROJECT_NAME} PRIVATE ${PROJECT_SOURCE_DIR}/include)
diff --git a/glew b/glew
deleted file mode 160000
index b323ebf..0000000
--- a/glew
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit b323ebf9adeae6a3f26f91277d4f62df509037fc
diff --git a/src/test_window.cpp b/src/test_window.cpp
index fead158..f828e74 100644
--- a/src/test_window.cpp
+++ b/src/test_window.cpp
@@ -27,6 +27,12 @@ int tests::glfw_window(unsigned width,unsigned height, std::string title)
         /* Render here */
         glClear(GL_COLOR_BUFFER_BIT);
 
+        glBegin(GL_TRIANGLES);
+        glVertex2f(-0.5f,-0.5f);
+        glVertex2f(0.0f,0.5f);
+        glVertex2f(0.5f,-0.5f);
+        glEnd();
+
         /* Swap front and back buffers */
         glfwSwapBuffers(window);