diff --git a/src/MancalaApp.tsx b/src/MancalaApp.tsx
index 450acf0..ba62f58 100644
--- a/src/MancalaApp.tsx
+++ b/src/MancalaApp.tsx
@@ -54,7 +54,7 @@ const MancalaApp: FunctionComponent = () => {
         connectToServer();
         return () => {
             context.rtmt.dispose();
-            context.themeManager.on("themechange", onThemeChange);
+            context.themeManager.off("themechange", onThemeChange);
         };
     }, []);