diff --git a/moduleroot/.rubocop.yml.erb b/moduleroot/.rubocop.yml.erb
index 5e539cc404b11ecd08589edb32e80cdf78d51270..fef1a57ee269dcac87ff8cb6c4491b0c77cc30c4 100644
--- a/moduleroot/.rubocop.yml.erb
+++ b/moduleroot/.rubocop.yml.erb
@@ -7,7 +7,7 @@ defaults = {
   ],
   'AllCops' => {
     'DisplayCopNames' => true,
-    'TargetRubyVersion' => '2.1',
+    'TargetRubyVersion' => '2.4',
     'Include' => [
       './**/*.rb',
     ],