diff --git a/cosky-rest-api/Dockerfile b/cosky-rest-api/Dockerfile
index ae784b05..6193b2ed 100644
--- a/cosky-rest-api/Dockerfile
+++ b/cosky-rest-api/Dockerfile
@@ -3,7 +3,7 @@
 ARG APP_NAME=cosky-rest-api
 ARG WORK_HOME=/opt/${APP_NAME}
 
-FROM dragonwell-registry.cn-hangzhou.cr.aliyuncs.com/dragonwell/dragonwell:17 AS base
+FROM dragonwell-registry.cn-hangzhou.cr.aliyuncs.com/dragonwell/dragonwell:21 AS base
 
 FROM base as build
 ARG WORK_HOME