diff --git a/package.json b/package.json
index d426211..22f4af9 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
   },
   "dependencies": {
     "isomorphic-ws": "^5.0.0",
-    "ws": "^8.12.1"
+    "ws": "^8.20.1"
   },
   "devDependencies": {
     "@ava/typescript": "^1.1.1",
diff --git a/yarn.lock b/yarn.lock
index 20a56ec..b32cb2f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5207,10 +5207,10 @@ write-file-atomic@^3.0.0, write-file-atomic@^3.0.3:
     signal-exit "^3.0.2"
     typedarray-to-buffer "^3.1.5"
 
-ws@^8.12.1:
-  version "8.12.1"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-8.12.1.tgz#c51e583d79140b5e42e39be48c934131942d4a8f"
-  integrity sha512-1qo+M9Ba+xNhPB+YTWUlK6M17brTut5EXbcBaMRN5pH5dFrXz7lzz1ChFSUq3bOUl8yEvSenhHmYUNJxFzdJew==
+ws@^8.20.1:
+  version "8.20.1"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-8.20.1.tgz#91a9ae2b312ccf98e0a85ec499b48cef45ab0ddb"
+  integrity sha512-It4dO0K5v//JtTXuPkfEOaI3uUN87iYPnqo/ZzqCoG3g8uhA66QUMs/SrM0YK7/NAu+r4LMh/9dq2A7k+rHs+w==
 
 xdg-basedir@^4.0.0:
   version "4.0.0"