diff --git a/Dockerfile b/Dockerfile
index e2f7fc0d..7acf90e6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 ARG DOVECOT_COMMUNITY_REPO=0
 ARG LOG_LEVEL=trace
 
-FROM docker.io/debian:12-slim AS stage-base
+FROM docker.io/debian:13-slim AS stage-base
 
 ARG DEBIAN_FRONTEND
 ARG DOVECOT_COMMUNITY_REPO