diff --git a/backend/Dockerfile b/backend/Dockerfile
index b3e13cf..5c61abf 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.11-slim-bookworm
 LABEL org.opencontainers.image.source=https://github.com/kiwix/mirrors-qa
 # Copy code
 COPY src /src/src
diff --git a/worker/manager.Dockerfile b/worker/manager.Dockerfile
index 7d06a72..9ab1dbb 100644
--- a/worker/manager.Dockerfile
+++ b/worker/manager.Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.11-slim-bookworm
 LABEL org.opencontainers.image.source=https://github.com/kiwix/mirrors-qa
 # Copy code
 COPY src /src/src