diff --git a/lib/benchmark/version.rb b/lib/benchmark/version.rb
index 90d1a39..36f8225 100644
--- a/lib/benchmark/version.rb
+++ b/lib/benchmark/version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Benchmark
   VERSION = "0.1.1"
 end