diff --git a/contrib/docker/Dockerfile b/contrib/docker/Dockerfile
index 0253d6f8..c54e0f74 100644
--- a/contrib/docker/Dockerfile
+++ b/contrib/docker/Dockerfile
@@ -1,6 +1,6 @@
 # -*-Dockerfile-*-
 
-ARG FEDORA_VERSION=40
+ARG FEDORA_VERSION=41
 ARG DEBIAN_VERSION=bullseye
 ARG GO_VERSION=1.22
 ARG GOSU_VERSION=1.17
diff --git a/contrib/docker/Dockerfile-alpine b/contrib/docker/Dockerfile-alpine
index 4b453e41..31f50307 100644
--- a/contrib/docker/Dockerfile-alpine
+++ b/contrib/docker/Dockerfile-alpine
@@ -1,6 +1,6 @@
 # -*-Dockerfile-*-
 
-ARG ALPINE_VERSION=3.19
+ARG ALPINE_VERSION=3.21
 ARG GO_VERSION=1.22
 ARG GOSU_VERSION=1.17