diff --git a/lib/tasks/cssbundling/clobber.rake b/lib/tasks/cssbundling/clobber.rake
index 9bfcae9..14b0215 100644
--- a/lib/tasks/cssbundling/clobber.rake
+++ b/lib/tasks/cssbundling/clobber.rake
@@ -1,7 +1,7 @@
 namespace :css do
   desc "Remove CSS builds"
   task :clobber do
-    rm_rf Dir["app/assets/builds/**/[^.]*.css"], verbose: false
+    rm_rf Dir["app/assets/builds/**/[^.]*.{css,css.map}"], verbose: false
   end
 end