diff --git a/examples/express-sample/package-lock.json b/examples/express-sample/package-lock.json
index 63f8a11..ba90348 100644
--- a/examples/express-sample/package-lock.json
+++ b/examples/express-sample/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.0.0",
       "dependencies": {
         "body-parser": "^2.2.1",
-        "config": "^4.1.1",
+        "config": "^4.4.1",
         "cookie-parser": "~1.4.7",
         "debug": "^4.3.4",
         "ejs": "~4.0.1",
@@ -6318,7 +6318,9 @@
       }
     },
     "node_modules/config": {
-      "version": "4.2.0",
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/config/-/config-4.4.1.tgz",
+      "integrity": "sha512-XfN4Q4+wBKkGtgMyQ+5ayjepdb0MrdiGKfBr0G1PTLx9rnqsX+Xiw03LEUtSALZU0UVfcFp6+xYV0NL8HLF94g==",
       "license": "MIT",
       "dependencies": {
         "json5": "^2.2.3"
diff --git a/examples/express-sample/package.json b/examples/express-sample/package.json
index 4d08204..8f79cd0 100644
--- a/examples/express-sample/package.json
+++ b/examples/express-sample/package.json
@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "body-parser": "^2.2.1",
-    "config": "^4.1.1",
+    "config": "^4.4.1",
     "cookie-parser": "~1.4.7",
     "debug": "^4.3.4",
     "ejs": "~4.0.1",