diff --git a/Dockerfile b/Dockerfile
index d2f60077..718dc7dc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim
+FROM python:3.10-slim-buster
 ENV TINI_VERSION v0.19.0
 COPY . /
 RUN echo "**** install system packages ****" \
diff --git a/VERSION b/VERSION
index e42b7618..f82713c2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.17.3-develop4
+1.17.3-develop5