diff --git a/package.json b/package.json
index e4dc298..b4883a2 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "@types/heatmap.js": "^2.0.36",
     "ajv": "^7.2.1",
     "bootstrap": "^4.6.0",
-    "core-js": "^2.6.12",
+    "core-js": "^3.9.1",
     "heatmap.js": "^2.0.5",
     "jquery": "^3.6.0",
     "leaflet": "^1.7.1",