diff --git a/3D-OpenGL-Rendering-Engine.md b/3D-OpenGL-Rendering-Engine.md
index 9e914bd..75d34a6 100644
--- a/3D-OpenGL-Rendering-Engine.md
+++ b/3D-OpenGL-Rendering-Engine.md
@@ -1,10 +1,10 @@
 Rendering engine based on pure OpenGL code, that can simulate simple 3D scenes, including the possibility to simulate dynamic objects moving in the scene.
 
 ## Run
-First set the absolute paths in `example.conf`:
+First set the absolute paths in `opengl.conf`:
 
     roscd esim_ros
-    gedit cfg/example.conf 
+    gedit cfg/opengl.conf
 
 Run the simulator as follows: