diff --git a/frontend/src/main.ts b/frontend/src/main.ts
index 702cab7..c1e0b61 100644
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -156,9 +156,9 @@ function setupMap(
         fetcher.call(async () => await fetchAndDisplayZipCode(coords));
     });
 
-    mapImg.onmouseleave = (_event: MouseEvent) => {
+    mapImg.addEventListener("mouseleave", (_event: MouseEvent) => {
         displayZipCode(zipCodeElement, null, null, null, null);
-    };
+    });
 }
 
 function setupSearchBar(zipCodeElement: HTMLParagraphElement) {