diff --git a/.git-hooks/pre_commit/master_hooks_match.rb b/.git-hooks/pre_commit/master_hooks_match.rb
index f2b845a9..09a0e34b 100644
--- a/.git-hooks/pre_commit/master_hooks_match.rb
+++ b/.git-hooks/pre_commit/master_hooks_match.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'fileutils'
 
 module Overcommit::Hook::PreCommit