diff --git a/src/TestHarnessApp/package.json b/src/TestHarnessApp/package.json
index 4f86d03031..292fc2e445 100644
--- a/src/TestHarnessApp/package.json
+++ b/src/TestHarnessApp/package.json
@@ -5,7 +5,7 @@
   "dependencies": {
     "consolidate": "0.10.0",
     "ejs": "0.8.5",
-    "express": "3.4.7"
+    "express": "4.19.2"
   },
   "devDependencies": {
     "mimosa-less": "*",