diff --git a/src/pages/VisProgPage/VisProg.tsx b/src/pages/VisProgPage/VisProg.tsx
index a083bbf..a31665f 100644
--- a/src/pages/VisProgPage/VisProg.tsx
+++ b/src/pages/VisProgPage/VisProg.tsx
@@ -186,10 +186,17 @@ function graphReducer() {
  * @constructor
  */
 function VisProgPage() {
+  const [programValidity, setProgramValidity] = useState<boolean>(true);
+  const sIndex = useFlowStore.getState().severityIndex;
+
+  useEffect(() => {
+    setProgramValidity(useFlowStore.getState().isProgramValid)
+  }, [sIndex]);
+
   return (
     <>
       <VisualProgrammingUI/>
-      <button onClick={runProgram}>run program</button>
+      <button onClick={runProgram} disabled={programValidity}>run program</button>
     </>
   )
 }