diff --git a/rails/rubocop-for-gem.yml b/rails/rubocop-for-gem.yml
index f762171e7d4d54d3113ed0c2b60b6e009451e3e3..fb0160ded2e7d4219f1375df3d79b0cfc022a220 100644
--- a/rails/rubocop-for-gem.yml
+++ b/rails/rubocop-for-gem.yml
@@ -82,6 +82,13 @@ Metrics/PerceivedComplexity:
 # END Metrics
 
 
+# BEGIN Naming
+# the default gem module must be named like the gem, so allow dashes
+Naming/FileName:
+  Exclude: [./lib/*.rb]
+# END Naming
+
+
 # BEGIN Style
 # documentation of classes in migrations and tests is not needed
 Style/Documentation: