diff --git a/frontend/src/Components/TimePerActivity.tsx b/frontend/src/Components/TimePerActivity.tsx
index 6175845..c5e4a9f 100644
--- a/frontend/src/Components/TimePerActivity.tsx
+++ b/frontend/src/Components/TimePerActivity.tsx
@@ -8,12 +8,12 @@ import { projectTimes } from "./GetProjectTimes";
  * @returns JSX.Element
  */
 export default function TimePerRole(): JSX.Element {
-  const [development, setDevelopment] = useState<number>();
-  const [meeting, setMeeting] = useState<number>();
-  const [admin, setAdmin] = useState<number>();
-  const [own_work, setOwnWork] = useState<number>();
-  const [study, setStudy] = useState<number>();
-  const [testing, setTesting] = useState<number>();
+  const [development, setDevelopment] = useState<number>(0);
+  const [meeting, setMeeting] = useState<number>(0);
+  const [admin, setAdmin] = useState<number>(0);
+  const [own_work, setOwnWork] = useState<number>(0);
+  const [study, setStudy] = useState<number>(0);
+  const [testing, setTesting] = useState<number>(0);
 
   const token = localStorage.getItem("accessToken") ?? "";
   const { projectName } = useParams();