diff --git a/Library/Homebrew/utils/gems.rb b/Library/Homebrew/utils/gems.rb
index 8fba9b3096..0a98b06728 100644
--- a/Library/Homebrew/utils/gems.rb
+++ b/Library/Homebrew/utils/gems.rb
@@ -8,7 +8,7 @@ require "English"
 
 module Homebrew
   # Keep in sync with the Gemfile.lock's BUNDLED WITH.
-  HOMEBREW_BUNDLER_VERSION = "1.17.2"
+  HOMEBREW_BUNDLER_VERSION = "1.17.3"
 
   module_function