diff --git a/fixtures/ember-cli/yarn.lock b/fixtures/ember-cli/yarn.lock
index 2bfbe4f..ba96137 100644
--- a/fixtures/ember-cli/yarn.lock
+++ b/fixtures/ember-cli/yarn.lock
@@ -4498,8 +4498,8 @@ underscore.string@~2.3.3:
   resolved "https://registry.yarnpkg.com/underscore.string/-/underscore.string-2.3.3.tgz#71c08bf6b428b1133f37e78fa3a21c82f7329b0d"
 
 underscore@>=1.8.3:
-  version "1.8.3"
-  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.8.3.tgz#4f3fb53b106e6097fcf9cb4109f2a5e9bdfa5022"
+  version "1.13.1"
+  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.13.1.tgz#0c1c6bd2df54b6b69f2314066d65b6cde6fcf9d1"
 
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"