diff --git a/shaders/obj.fp b/shaders/obj.fp
index 35dc833..9b030d7 100644
--- a/shaders/obj.fp
+++ b/shaders/obj.fp
@@ -1,3 +1,4 @@
+#version 140
 
 #ifdef GL_FRAGMENT_PRECISION_HIGH
 precision highp float;
diff --git a/shaders/obj.vp b/shaders/obj.vp
index 7d88a5f..730d61c 100644
--- a/shaders/obj.vp
+++ b/shaders/obj.vp
@@ -1,3 +1,4 @@
+#version 140
 
 attribute vec3 pos;
 attribute vec3 normal;