diff --git a/heatmap-tool/frontend/src/App.tsx b/heatmap-tool/frontend/src/App.tsx
index 812a544c..b1e67203 100644
--- a/heatmap-tool/frontend/src/App.tsx
+++ b/heatmap-tool/frontend/src/App.tsx
@@ -8,7 +8,7 @@ import FilterPanel from './components/FilterPanel';
 import MapDisplay from './components/MapDisplay';
 import ErrorBoundary from './components/ErrorBoundary';
 import PlzSelector from './components/PlzSelector';
-import TooltipManager, { TooltipColumn } from './components/TooltipManager';
+import TooltipManager, { type TooltipColumn } from './components/TooltipManager';
 
 // Define types for our state
 export interface FilterOptions {