diff --git a/Library/Homebrew/vendor/bundle/bundler/setup.rb b/Library/Homebrew/vendor/bundle/bundler/setup.rb
index 75d2027cfe..d2d2764fc7 100644
--- a/Library/Homebrew/vendor/bundle/bundler/setup.rb
+++ b/Library/Homebrew/vendor/bundle/bundler/setup.rb
@@ -13,8 +13,8 @@ $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/public_suffix-4.0.7/l
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/addressable-2.8.0/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/ast-2.4.2/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/bindata-2.4.10/lib"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/extensions/x86_64-darwin-15/2.6.0-static/msgpack-1.5.2"
-$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/msgpack-1.5.2/lib"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/extensions/x86_64-darwin-15/2.6.0-static/msgpack-1.5.3"
+$:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/msgpack-1.5.3/lib"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/extensions/x86_64-darwin-15/2.6.0-static/bootsnap-1.12.0"
 $:.unshift "#{path}/../#{ruby_engine}/#{ruby_version}/gems/bootsnap-1.12.0/lib"
 $:.unshift "#{path}/"