diff --git a/package-lock.json b/package-lock.json
index a687e00..d8139be 100644
--- a/package-lock.json
+++ b/package-lock.json
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-        "http-parser-js": ">=0.4.0",
+        "http-parser-js": ">=0.4.0 <0.4.11",
+        "safe-buffer": ">=5.1.0",
         "websocket-extensions": ">=0.1.1"
       }
     },
diff --git a/package.json b/package.json
index 933bd4c..9d05cc7 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "uglifyjs-webpack-plugin": "1.3.0",
     "webpack": "4.17.0",
     "webpack-cli": "3.1.0",
-    "webpack-dev-server": "3.2.1",
+    "webpack-dev-server": "3.8.0",
     "webpack-md5-hash": "0.0.6"
   }
 }