diff --git a/.rubocop.yml b/.rubocop.yml
index f196c6a6..389634f5 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -100,6 +100,10 @@ Style/TrailingWhitespace:
 Style/ZeroLengthPredicate:
   Enabled: true
 
+# This cop checks for tabs where spaces should be used.
+Style/Tab:
+  Enabled: true
+
 #################### Metrics ###############################
 
 # Avoid deep blocks nesting