diff --git a/package.json b/package.json
index a37dc4e..636f7e5 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "nano-time": "^1.0.0",
     "rfc3339nano": "^1.0.2",
     "strformat": "^0.0.7",
-    "ws": "^6.1.2"
+    "ws": "^7.4.6"
   },
   "ava": {
     "failFast": true,
diff --git a/yarn.lock b/yarn.lock
index 07bc51b..4e57693 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -236,10 +236,6 @@ async-each@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/async-each/-/async-each-1.0.1.tgz#19d386a1d9edc6e7c1c85d388aedbcc56d33602d"
 
-async-limiter@~1.0.0:
-  version "1.0.0"
-  resolved "http://registry.npm.taobao.org/async-limiter/download/async-limiter-1.0.0.tgz#78faed8c3d074ab81f22b4e985d79e8738f720f8"
-
 async@^1.4.0:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
@@ -3418,7 +3414,7 @@ once@^1.3.0:
 
 onetime@^1.0.0:
   version "1.1.0"
-  resolved "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
+  resolved "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
 
 onetime@^2.0.0:
   version "2.0.1"
@@ -4723,11 +4719,10 @@ write@^0.2.1:
   dependencies:
     mkdirp "^0.5.1"
 
-ws@^6.1.2:
-  version "6.1.2"
-  resolved "https://registry.npmjs.org/ws/-/ws-6.1.2.tgz#3cc7462e98792f0ac679424148903ded3b9c3ad8"
-  dependencies:
-    async-limiter "~1.0.0"
+ws@^7.4.6:
+  version "7.4.6"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.4.6.tgz#5654ca8ecdeee47c33a9a4bf6d28e2be2980377c"
+  integrity sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==
 
 xdg-basedir@^3.0.0:
   version "3.0.0"