diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index ebed08ac37..0e80bca00c 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -54,7 +54,7 @@ GEM
     pry (0.14.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (5.0.1)
+    public_suffix (5.0.3)
     racc (1.7.1)
     rack (3.0.8)
     rainbow (3.1.1)