diff --git a/.rubocop.yml b/.rubocop.yml
index 6b890cd50..67477acd5 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,7 +1,7 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   TargetRailsVersion: 5.2
 
   Exclude: