diff --git a/packages/singly-linked-list/yarn.lock b/packages/singly-linked-list/yarn.lock
index 4272a2d..23f9352 100644
--- a/packages/singly-linked-list/yarn.lock
+++ b/packages/singly-linked-list/yarn.lock
@@ -4041,6 +4041,11 @@ write@1.0.3:
   dependencies:
     mkdirp "^0.5.1"
 
+ws@7.5.7:
+  version "7.5.7"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.5.7.tgz#9e0ac77ee50af70d58326ecff7e85eb3fa375e67"
+  integrity sha512-KMvVuFzpKBuiIXW3E4u3mySRO2/mCHSyZDJQM5NQ9Q9KHWHWh0NHgfbRMLLrceUK5qAL4ytALJbpRMjixFZh8A==
+
 ws@^5.2.0:
   version "5.2.2"
   resolved "https://registry.yarnpkg.com/ws/-/ws-5.2.2.tgz#dffef14866b8e8dc9133582514d1befaf96e980f"