diff --git a/package.json b/package.json
index b6c6df5d46dd..8251dc433cd7 100644
--- a/package.json
+++ b/package.json
@@ -82,7 +82,7 @@
     "speedline": "1.2.0",
     "update-notifier": "^2.1.0",
     "whatwg-url": "4.0.0",
-    "ws": "1.1.2",
+    "ws": "1.1.5",
     "yargs": "3.32.0"
   },
   "repository": "GoogleChrome/lighthouse",
diff --git a/yarn.lock b/yarn.lock
index 7c83d47b413f..229ea0c0708e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3620,9 +3620,10 @@ write@^0.2.1:
   dependencies:
     mkdirp "^0.5.1"
 
-ws@1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-1.1.1.tgz#082ddb6c641e85d4bb451f03d52f06eabdb1f018"
+ws@1.1.5:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-1.1.5.tgz#cbd9e6e75e09fc5d2c90015f21f0c40875e0dd51"
+  integrity sha512-o3KqipXNUdS7wpQzBHSe180lBGO60SoK0yVo3CYJgb2MkobuWuBX6dhkYP5ORCLd55y+SaflMOV5fqAB53ux4w==
   dependencies:
     options ">=0.0.5"
     ultron "1.0.x"