1 files changed, 2 insertions, 0 deletions
diff --git a/lib/open-uri.rb b/lib/open-uri.rb
index e49a09b192..b8093ad40c 100644
--- a/lib/open-uri.rb
+++ b/lib/open-uri.rb
@@ -1,3 +1,5 @@
+#
+# -*- frozen_string_literal: true -*-
 require 'uri'
 require 'stringio'
 require 'time'