diff --git a/Library/Homebrew/test/Gemfile.lock b/Library/Homebrew/test/Gemfile.lock
index 7c1bcbe00e..4e622c0df4 100644
--- a/Library/Homebrew/test/Gemfile.lock
+++ b/Library/Homebrew/test/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     parallel (1.12.1)
     parallel_tests (2.27.1)
       parallel
-    parser (2.5.3.0)
+    parser (2.6.0.0)
       ast (~> 2.4.0)
     powerpack (0.1.2)
     rainbow (3.0.0)