diff --git a/components/gridlines.frag b/components/gridlines.frag
index d057c23..8a122b7 100644
--- a/components/gridlines.frag
+++ b/components/gridlines.frag
@@ -1,10 +1,9 @@
-//
-// Example blue light filter shader.
-// 
+#version 300 es
 
 precision mediump float;
-varying vec2 v_texcoord;
+in vec2 v_texcoord;
 uniform sampler2D tex;
+out vec4 fragColor;
 
 void main() {
 	vec4 pixColor = texture2D(tex, v_texcoord);
@@ -14,8 +13,6 @@ void main() {
 			pixColor[0] *= 0.97;
 			pixColor[1] *= 0.97;
 			pixColor[2] *= 0.97;
-
-		// pixColor = vec4(0.10980392156,0.10588235294 ,0.09411764705 ,1);
     }
-	gl_FragColor = pixColor;
+	fragColor = pixColor;
 }
\ No newline at end of file
diff --git a/theme.conf b/theme.conf
index d9fcac0..16e9be2 100644
--- a/theme.conf
+++ b/theme.conf
@@ -41,8 +41,8 @@ decoration {
     range = 1
     render_power = 1
     offset =5 5
-    # screen_shader = $yorha/components/gridlines.frag
     }
+    screen_shader = $yorha/components/gridlines.frag
 }
 
 plugin {