diff --git a/Procfile.dev b/Procfile.dev
index 9ed0afdc578c..cf52204b251b 100644
--- a/Procfile.dev
+++ b/Procfile.dev
@@ -1,3 +1,3 @@
 web: bundle exec rails server -p ${PORT:="8080"} -b ${HOST:="127.0.0.1"} --env ${RAILS_ENV:="development"}
-assets: cd frontend && npm run webpack-watch
+assets: cd frontend && RAILS_ENV=${RAILS_ENV:="development"} npm run webpack-watch
 worker: bundle exec rake jobs:work