diff --git a/lib/install/dev b/lib/install/dev
index ad72c7d..48952ac 100755
--- a/lib/install/dev
+++ b/lib/install/dev
@@ -13,4 +13,4 @@ export PORT="${PORT:-3000}"
 export RUBY_DEBUG_OPEN="true"
 export RUBY_DEBUG_LAZY="true"
 
-exec foreman start -f Procfile.dev "$@"
+exec foreman start -f Procfile.dev --env /dev/null "$@"