diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 95682cd06e..5e8815ce45 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
     nokogiri (1.10.2)
       mini_portile2 (~> 2.4.0)
     ntlm-http (0.1.1)
-    parallel (1.15.0)
+    parallel (1.16.0)
     parallel_tests (2.28.0)
       parallel
     parser (2.6.2.0)