diff --git a/bin/dev b/bin/dev
index 20dee8d5d1e..a55e33a5e0f 100755
--- a/bin/dev
+++ b/bin/dev
@@ -9,5 +9,5 @@ if ! test -d sandbox; then
   bin/sandbox
 fi
 
-export PORT=3000
+export PORT=${PORT:-3000}
 exec foreman start -f Procfile.dev "$@"