diff --git a/siyuan/3.1.20/docker-compose.yml b/siyuan/3.1.20/docker-compose.yml
index b0156ed12..b5b80c1ae 100644
--- a/siyuan/3.1.20/docker-compose.yml
+++ b/siyuan/3.1.20/docker-compose.yml
@@ -4,7 +4,7 @@ networks:
 
 services:
   siyuan:
-    image: b3log/siyuan:v3.1.20
+    image: b3log/siyuan:v3.1.21
     container_name: ${CONTAINER_NAME}
     labels:
       createdBy: "Apps"