diff --git a/extension.js b/extension.js
index 349e8e1..dd6126e 100644
--- a/extension.js
+++ b/extension.js
@@ -14,9 +14,8 @@ const InvertWindowEffect = new Lang.Class({
 	Name: 'InvertWindowEffect',
 	Extends: Clutter.ShaderEffect,
 
-	_init: function(params) {
-		this.parent(params);
-		this.set_shader_source(' \
+	vfunc_get_static_shader_source: function() {
+		return ' \
 			uniform sampler2D tex; \
 			void main() { \
 				vec4 color = texture2D(tex, cogl_tex_coord_in[0].st); \
@@ -27,12 +26,12 @@ const InvertWindowEffect = new Lang.Class({
 				color.rgb *= color.a; \
 				cogl_color_out = color * cogl_color_in; \
 			} \
-		');
+		';
 	},
 
-	vfunc_paint_target: function() {
+	vfunc_paint_target: function(paint_context) {
 		this.set_uniform_value("tex", 0);
-		this.parent();
+		this.parent(paint_context);
 	}
 });
 
diff --git a/metadata.json b/metadata.json
index 3a3e5ae..56a4a95 100644
--- a/metadata.json
+++ b/metadata.json
@@ -4,7 +4,7 @@
 	"description": "Inverts the color of individual windows\nDefault shortcut is Super+I",
 	"url": "https://github.com/maiself/gnome-shell-extension-invert-color",
 	"shell-version": [
-		"3.32"
+		"3.36"
 	],
 	"settings-schema": "org.gnome.shell.extensions.invert-window",
 	"version": 5