diff --git a/R1_useContextReducer_useContextuseReducer/Finished/app.js b/R1_useContextReducer_useContextuseReducer/Finished/app.js
index 90cd12a..fc84ff7 100644
--- a/R1_useContextReducer_useContextuseReducer/Finished/app.js
+++ b/R1_useContextReducer_useContextuseReducer/Finished/app.js
@@ -159,12 +159,12 @@ function CounterSummary() {
     const setVisibleTab1 = React.useCallback((event) => {
         tabDispatch({ type: 'change-tab', tab: 1 })
         event.preventDefault();
-    });
+    }, []);
 
     const setVisibleTab2 = React.useCallback((event) => {
         tabDispatch({ type: 'change-tab', tab: 2 })
         event.preventDefault();
-    });
+    }, []);
 
     return (
         <section>
@@ -188,4 +188,4 @@ const CounterSummaryDetail = React.memo(function CounterSummaryDetail({ name, to
     return (
         <p>{name} ({total})</p>
     )
-});
\ No newline at end of file
+});