diff --git a/proxy_config b/proxy_config
index f21101d..a20d70f 100644
--- a/proxy_config
+++ b/proxy_config
@@ -5,7 +5,8 @@
 		"GENERATE_CERTIFICATE": "true",
                 "LETSENCRYPT_URL": "letsencrypt.org",
                 "LETSENCRYPT_SERVICE_NAME": "letsencrypt.json",
-                "CERT_DIR": "/keys",
+                "LETSENCRYPT_SERVER": "letsencrypt",
+		"CERT_DIR": "/keys",
                 "DOMAIN_DIR": "/domains",
                 "PROXY_SERVICE_FILE": "smarthost-proxy.json",
                 "PROXY_CONFIG_DIR": "/proxy_config",