diff --git a/theme/light/theme.json b/theme/light/theme.json
index 58abe93eb..f74baaf99 100644
--- a/theme/light/theme.json
+++ b/theme/light/theme.json
@@ -1,5 +1,6 @@
 {
     "avatar-rounding": "50%",
+    "icon-brightness-change": "80%",
     "button-selected": "#999",
     "button-background": "#bbbbbb",
     "button-background-hover": "#999",