diff --git a/fixtures/packaging/brunch/dev/yarn.lock b/fixtures/packaging/brunch/dev/yarn.lock
index b7983757f9e8c..564eec0059237 100644
--- a/fixtures/packaging/brunch/dev/yarn.lock
+++ b/fixtures/packaging/brunch/dev/yarn.lock
@@ -1322,8 +1322,8 @@ minimist@~0.0.1:
     minimist "0.0.8"
 
 mout@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/mout/-/mout-1.1.0.tgz#0b29d41e6a80fa9e2d4a5be9d602e1d9d02177f6"
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/mout/-/mout-1.2.4.tgz#9ffd261c4d6509e7ebcbf6b641a89b36ecdf8155"
 
 ms@0.7.1:
   version "0.7.1"