diff --git a/yarn.lock b/yarn.lock
index 09b98fa0..3a73564c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -391,10 +391,6 @@ 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 "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.0.tgz#78faed8c3d074ab81f22b4e985d79e8738f720f8"
-
 async@0.9.x, async@~0.9.0:
   version "0.9.2"
   resolved "https://registry.yarnpkg.com/async/-/async-0.9.2.tgz#aea74d5e61c1f899613bf64bda66d4c78f2fd17d"
@@ -6419,10 +6415,6 @@ uid2@0.0.3:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/uid2/-/uid2-0.0.3.tgz#483126e11774df2f71b8b639dcd799c376162b82"
 
-ultron@~1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/ultron/-/ultron-1.1.1.tgz#9fe1536a10a664a65266a1e3ccf85fd36302bc9c"
-
 umd@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/umd/-/umd-3.0.1.tgz#8ae556e11011f63c2596708a8837259f01b3d60e"
@@ -6732,12 +6724,8 @@ write@^0.2.1:
     mkdirp "^0.5.1"
 
 "ws@>= 0.8.0":
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-4.0.0.tgz#bfe1da4c08eeb9780b986e0e4d10eccd7345999f"
-  dependencies:
-    async-limiter "~1.0.0"
-    safe-buffer "~5.1.0"
-    ultron "~1.1.0"
+  version "8.17.1"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-8.17.1.tgz#9293da530bb548febc95371d90f9c878727d919b"
 
 xml-escape@~1.0.0:
   version "1.0.0"