diff --git a/Dockerfile b/Dockerfile
index fb7f2218..6795d2c5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-kasmvnc:alpine320
+FROM ghcr.io/linuxserver/baseimage-kasmvnc:alpine321
 
 # set version label
 ARG BUILD_DATE
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index b2f5fb65..16df04e6 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-kasmvnc:arm64v8-alpine320
+FROM ghcr.io/linuxserver/baseimage-kasmvnc:arm64v8-alpine321
 
 # set version label
 ARG BUILD_DATE
diff --git a/README.md b/README.md
index 9f1d4ba7..f0f7f798 100644
--- a/README.md
+++ b/README.md
@@ -463,6 +463,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **06.12.24:** - Rebase Alpine to 3.21.
 * **26.09.24:** - Swap from firefox to chromium on Alpine images.
 * **23.05.24:** - Rebase Alpine to 3.20, document Nvidia support.
 * **22.04.24:** - Rebase Ubuntu to Noble.
diff --git a/readme-vars.yml b/readme-vars.yml
index 7f6ceb80..3609a2d4 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -149,6 +149,7 @@ init_diagram: |
   "webtop:latest" <- Base Images
 # changelog
 changelogs:
+  - {date: "06.12.24:", desc: "Rebase Alpine to 3.21."}
   - {date: "26.09.24:", desc: "Swap from firefox to chromium on Alpine images."}
   - {date: "23.05.24:", desc: "Rebase Alpine to 3.20, document Nvidia support."}
   - {date: "22.04.24:", desc: "Rebase Ubuntu to Noble."}