diff --git a/sample/Archiving/package.json b/sample/Archiving/package.json
index cdd99f88..97f07c5c 100644
--- a/sample/Archiving/package.json
+++ b/sample/Archiving/package.json
@@ -11,6 +11,6 @@
   "dependencies": {
     "body-parser": "^1.12.4",
     "ejs": "^2.5.5",
-    "express": "^3.5.0"
+    "express": "^4.21.2"
   }
 }
diff --git a/sample/HelloWorld/package.json b/sample/HelloWorld/package.json
index 26fc71d7..9518e023 100644
--- a/sample/HelloWorld/package.json
+++ b/sample/HelloWorld/package.json
@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "express": "^3.5.0",
+    "express": "^4.21.2",
     "ejs": "^2.5.5"
   }
 }
diff --git a/sample/SipInterconnect/package.json b/sample/SipInterconnect/package.json
index 31a3f942..04a295a9 100755
--- a/sample/SipInterconnect/package.json
+++ b/sample/SipInterconnect/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "body-parser": "~1.12.0",
     "ejs": "^2.5.5",
-    "express": "~4.12.2",
+    "express": "~4.21.2",
     "opentok": "^2.3.2",
     "request": "^2.73.0"
   }