diff --git a/src/features/charts/server/components/SessionsRunningTimeChart.js b/src/features/charts/server/components/SessionsRunningTimeChart.js
index 5b3cf43..b8709eb 100644
--- a/src/features/charts/server/components/SessionsRunningTimeChart.js
+++ b/src/features/charts/server/components/SessionsRunningTimeChart.js
@@ -35,8 +35,8 @@ const SessionsRunningTimeChart = ({ data }) => {
   };
 
   CustomTooltip.propTypes = {
-    active: PropTypes.bool.isRequired,
-    payload: PropTypes.object
+    active: PropTypes.bool,
+    payload: PropTypes.array
   };
 
   return (