diff --git a/lib/install/dev b/lib/install/dev
index 74ade16..47b0d41 100755
--- a/lib/install/dev
+++ b/lib/install/dev
@@ -5,4 +5,4 @@ if ! gem list foreman -i --silent; then
   gem install foreman
 fi
 
-exec foreman start -f Procfile.dev "$@"
+exec foreman start -f Procfile.dev --env /dev/null "$@"