diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index c1acba2a52..c0a06e7cb9 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -58,7 +58,7 @@ GEM
       racc (~> 1.4)
     ntlm-http (0.1.1)
     parallel (1.20.1)
-    parallel_tests (3.5.2)
+    parallel_tests (3.6.0)
       parallel
     parlour (6.0.0)
       commander (~> 4.5)