diff --git a/docker/update.sh b/docker/update.sh
index 2d70339..cd04e1b 100644
--- a/docker/update.sh
+++ b/docker/update.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 set -u
-
+${ACME_HOME}/acme.sh --set-default-ca --server letsencrypt
 if [ "${ACME_ENABLED:=true}" = "true" ]; then
   # 使用acme获取/更新证书
   ${ACME_HOME}/acme.sh ${ACME_PARAMS:-}  \