diff --git a/ep12/demo/yarn.lock b/ep12/demo/yarn.lock
index c51c307..92319e9 100644
--- a/ep12/demo/yarn.lock
+++ b/ep12/demo/yarn.lock
@@ -2921,9 +2921,9 @@ to-regex@^3.0.1, to-regex@^3.0.2:
     safe-regex "^1.1.0"
 
 tree-kill@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/tree-kill/-/tree-kill-1.2.1.tgz#5398f374e2f292b9dcc7b2e71e30a5c3bb6c743a"
-  integrity sha512-4hjqbObwlh2dLyW4tcz0Ymw0ggoaVDMveUB9w8kFSQScdRLo0gxO9J7WFcUBo+W3C1TLdFIEwNOWebgZZ0RH9Q==
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/tree-kill/-/tree-kill-1.2.2.tgz#4ca09a9092c88b73a7cdc5e8a01b507b0790a0cc"
+  integrity sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==
 
 ts-loader@^6.2.1:
   version "6.2.1"