diff --git a/Library/Homebrew/test/Gemfile.lock b/Library/Homebrew/test/Gemfile.lock
index caade9584e..044db4dd5c 100644
--- a/Library/Homebrew/test/Gemfile.lock
+++ b/Library/Homebrew/test/Gemfile.lock
@@ -15,7 +15,7 @@ GEM
     parallel (1.12.1)
     parallel_tests (2.26.0)
       parallel
-    parser (2.5.1.2)
+    parser (2.5.3.0)
       ast (~> 2.4.0)
     powerpack (0.1.2)
     rainbow (3.0.0)