diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 30f626553c..abb96db19b 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     coderay (1.1.3)
     commander (4.6.0)
       highline (~> 2.0.0)
-    concurrent-ruby (1.2.1)
+    concurrent-ruby (1.2.2)
     connection_pool (2.3.0)
     did_you_mean (1.6.3)
     diff-lcs (1.5.0)