diff --git a/defaults/main.yml b/defaults/main.yml
index 6169224..2677036 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -1,6 +1,6 @@
 ---
 postfix_relay_sasl_host: smtp.gmail.com
-postfix_relay_sasl_port: 587
+postfix_relay_sasl_port: "587"
 postfix_relay_sasl_user: user
 postfix_relay_sasl_domain: gmail.com
 postfix_relay_sasl_passwd: secure