diff --git a/example/zoo/package.json b/example/zoo/package.json
index 9099a507..f923b3bb 100644
--- a/example/zoo/package.json
+++ b/example/zoo/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "commander": "^9.4.1",
-    "express": "^4.15.2",
+    "express": "^4.21.1",
     "express-basic-auth": "^1.2.1",
     "lightstep-tracer": "^0.20.2",
     "opentracing": "0.14.7",