diff --git a/src/shimatta-opengl-colored-triangle.c b/src/shimatta-opengl-colored-triangle.c
index 7660c62..b965662 100644
--- a/src/shimatta-opengl-colored-triangle.c
+++ b/src/shimatta-opengl-colored-triangle.c
@@ -69,14 +69,41 @@ static void draw_with_model_matrix(ShimattaOpenglGraphics *self, mat4 m, mat4 n)
 	draw(self);
 }
 
+static void shimatta_opengl_colored_triangle_dispose(GObject *obj)
+{
+	ShimattaOpenglColoredTriangle *self;
+	ShimattaOpenglColoredTrianglePrivate *priv;
+
+	self = SHIMATTA_OPENGL_COLORED_TRIANGLE(obj);
+	priv = shimatta_opengl_colored_triangle_get_instance_private(self);
+
+	if (priv->vao) {
+		glDeleteVertexArrays(1, &priv->vao);
+		priv->vao = 0;
+	}
+
+	if (priv->vbo) {
+		glDeleteBuffers(1, &priv->vbo);
+		priv->vbo = 0;
+	}
+
+	g_clear_object(&priv->prog);
+
+	G_OBJECT_CLASS(shimatta_opengl_colored_triangle_parent_class)->dispose(obj);
+}
+
 void shimatta_opengl_colored_triangle_class_init(ShimattaOpenglColoredTriangleClass *klass)
 {
 	ShimattaOpenglGraphicsClass *gclass;
+	GObjectClass *oclass;
+
 	gclass = SHIMATTA_OPENGL_GRAPHICS_CLASS(klass);
+	oclass = G_OBJECT_CLASS(klass);
 
 	gclass->draw = draw;
 	gclass->realize = realize;
 	gclass->draw_with_model_matrix = draw_with_model_matrix;
+	oclass->dispose = shimatta_opengl_colored_triangle_dispose;
 }
 
 void shimatta_opengl_colored_triangle_init(ShimattaOpenglColoredTriangle *self)