diff --git a/examples/active-class-name/package.json b/examples/active-class-name/package.json
index 349de02f4d84be4..6513b825ee0a6cd 100644
--- a/examples/active-class-name/package.json
+++ b/examples/active-class-name/package.json
@@ -8,6 +8,7 @@
   "dependencies": {
     "next": "latest",
     "react": "^17.0.2",
-    "react-dom": "^17.0.2"
+    "react-dom": "^17.0.2",
+    "prop-types": "^15.7.2"
   }
 }