diff --git a/static/grapheneos.css b/static/grapheneos.css
index 6272805c..b577714e 100644
--- a/static/grapheneos.css
+++ b/static/grapheneos.css
@@ -1,5 +1,5 @@
 /* use the standard Material Light theme to match GrapheneOS apps */
-/* https://android.googlesource.com/platform/frameworks/base/+/android-9.0.0_r35/core/res/res/values/colors_material.xml */
+/* https://android.googlesource.com/platform/frameworks/base/+/android-11.0.0_r32/core/res/res/values/colors_material.xml */
 
 html {
     height: -webkit-fill-available; /* replace with stretch when standardized */