diff --git a/.env.sample b/.env.sample
index c1076e3a..27c4fb9c 100644
--- a/.env.sample
+++ b/.env.sample
@@ -4,7 +4,7 @@
 #
 # Please use `openssl rand -hex 32` to create SECRET_KEY
 
-DATABASE_URL=postgres://user:pass@localhost/outline
+DATABASE_URL=postgres://user:pass@localhost:5432/outline
 DATABASE_URL_TEST=postgres://user:pass@localhost/outline-test
 SECRET_KEY=generate_a_new_key
 PORT=3000