diff --git a/example/server/package-lock.json b/example/server/package-lock.json
index fb6817f..6dd6e9e 100644
--- a/example/server/package-lock.json
+++ b/example/server/package-lock.json
@@ -5,13 +5,14 @@
   "requires": true,
   "packages": {
     "": {
+      "name": "server",
       "version": "0.0.1",
       "license": "ISC",
       "dependencies": {
         "fs": "*",
         "http": "*",
         "https": "*",
-        "ws": "*"
+        "ws": "^7.5.7"
       }
     },
     "node_modules/fs": {
@@ -30,9 +31,9 @@
       "integrity": "sha1-PDfHrhqO65ZpBKKtHpdaGUt+06Q="
     },
     "node_modules/ws": {
-      "version": "7.4.6",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
-      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
+      "version": "7.5.7",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.7.tgz",
+      "integrity": "sha512-KMvVuFzpKBuiIXW3E4u3mySRO2/mCHSyZDJQM5NQ9Q9KHWHWh0NHgfbRMLLrceUK5qAL4ytALJbpRMjixFZh8A==",
       "engines": {
         "node": ">=8.3.0"
       },
@@ -67,9 +68,9 @@
       "integrity": "sha1-PDfHrhqO65ZpBKKtHpdaGUt+06Q="
     },
     "ws": {
-      "version": "7.4.6",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
-      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
+      "version": "7.5.7",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.7.tgz",
+      "integrity": "sha512-KMvVuFzpKBuiIXW3E4u3mySRO2/mCHSyZDJQM5NQ9Q9KHWHWh0NHgfbRMLLrceUK5qAL4ytALJbpRMjixFZh8A==",
       "requires": {}
     }
   }
diff --git a/example/server/package.json b/example/server/package.json
index bd6d969..3b2a953 100644
--- a/example/server/package.json
+++ b/example/server/package.json
@@ -13,6 +13,6 @@
     "fs": "*",
     "http": "*",
     "https": "*",
-    "ws": "*"
+    "ws": "7.5.7"
   }
 }