diff --git a/engine.io-server-test/src/test/resources/package-lock.json b/engine.io-server-test/src/test/resources/package-lock.json
index 6bfb503..3d63a50 100644
--- a/engine.io-server-test/src/test/resources/package-lock.json
+++ b/engine.io-server-test/src/test/resources/package-lock.json
@@ -5,7 +5,7 @@
   "packages": {
     "": {
       "dependencies": {
-        "engine.io": "^5.1.0",
+        "engine.io": "^5.2.1",
         "engine.io-client": "^5.1.1",
         "engine.io-parser": "^4.0.2",
         "get-stdin": "^6.0.0"
@@ -81,9 +81,9 @@
       }
     },
     "node_modules/engine.io": {
-      "version": "5.1.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-5.1.0.tgz",
-      "integrity": "sha512-A2i4kVvOA3qezQLlMz+FayGFdqOo0LP3fYrb0VqXMDXKoXcbgM0KxcEYnsdVzOMJQErIAb1GIStRj7UWFoiqlQ==",
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-5.2.1.tgz",
+      "integrity": "sha512-hyNxjVgWp619QMfqi/+/6/LQF+ueOIWeVOza3TeyvxUGjeT9U/xPkkHW/NJNuhbStrxMujEoMadoc2EY7DDEnw==",
       "dependencies": {
         "accepts": "~1.3.4",
         "base64id": "2.0.0",
@@ -269,9 +269,9 @@
       }
     },
     "engine.io": {
-      "version": "5.1.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-5.1.0.tgz",
-      "integrity": "sha512-A2i4kVvOA3qezQLlMz+FayGFdqOo0LP3fYrb0VqXMDXKoXcbgM0KxcEYnsdVzOMJQErIAb1GIStRj7UWFoiqlQ==",
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-5.2.1.tgz",
+      "integrity": "sha512-hyNxjVgWp619QMfqi/+/6/LQF+ueOIWeVOza3TeyvxUGjeT9U/xPkkHW/NJNuhbStrxMujEoMadoc2EY7DDEnw==",
       "requires": {
         "accepts": "~1.3.4",
         "base64id": "2.0.0",
diff --git a/engine.io-server-test/src/test/resources/package.json b/engine.io-server-test/src/test/resources/package.json
index 994ccc0..3d76429 100644
--- a/engine.io-server-test/src/test/resources/package.json
+++ b/engine.io-server-test/src/test/resources/package.json
@@ -1,7 +1,7 @@
 {
   "private": true,
   "dependencies": {
-    "engine.io": "^5.1.0",
+    "engine.io": "^5.2.1",
     "engine.io-client": "^5.1.1",
     "engine.io-parser": "^4.0.2",
     "get-stdin": "^6.0.0"