diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 56f325e05b..5cd88ae100 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       tins (~> 1.0)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tins (1.20.3)
+    tins (1.21.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unf (0.1.4)