diff --git a/roundcube/roundcubemail-deployment.yaml b/roundcube/roundcubemail-deployment.yaml
index 9175f27..181b02a 100644
--- a/roundcube/roundcubemail-deployment.yaml
+++ b/roundcube/roundcubemail-deployment.yaml
@@ -46,11 +46,11 @@ spec:
         - name: ROUNDCUBEMAIL_DEFAULT_HOST
           value: tls://mail.michaelthomson.dev
         - name: ROUNDCUBEMAIL_DEFAULT_PORT
-          value: 993
+          value: "993"
         - name: ROUNDCUBEMAIL_SMTP_SERVER
           value: tls://mail.michaelthomson.dev
         - name: ROUNDCUBEMAIL_SMTP_PORT
-          value: 465
+          value: "465"
         - name: ROUNDCUBEMAIL_SKIN
           value: elastic
         - name: ROUNDCUBEMAIL_PLUGINS