diff --git a/Dockerfile b/Dockerfile
index 3f61e58..30d9ccf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -37,7 +37,7 @@ RUN cd cartodb && bundle exec grunt
 RUN cd cartodb/config && \
   cp app_config.yml.sample app_config.yml && \
   cp database.yml.sample database.yml && \
-  grunt_production.json.sample grunt_production.json    
+  cp grunt_production.json.sample grunt_production.json