diff --git a/ecs/jskult-dbdump/Dockerfile b/ecs/jskult-dbdump/Dockerfile
index 3c410b72..9c6838cb 100644
--- a/ecs/jskult-dbdump/Dockerfile
+++ b/ecs/jskult-dbdump/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9
+FROM python:3.9-bullseye
 
 ENV TZ="Asia/Tokyo"