diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 837f6c963ce78..98466e5fed953 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     colorize (0.8.1)
     commander (4.5.2)
       highline (~> 2.0.0)
-    concurrent-ruby (1.1.7)
+    concurrent-ruby (1.2.0)
     connection_pool (2.2.3)
     diff-lcs (1.4.4)
     docile (1.3.2)