diff --git a/Dockerfile b/Dockerfile
index 746737b..f68b451 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ ARG LITESTREAM_SHA256="eb75a3de5cab03875cdae9f5f539e6aedadd66607003d9b1e7a907794
 # Container version args
 # Bump these every time there is a new release. No checksum needed.
 ARG CADDY_VERSION="2.10.0"
-ARG MAIN_IMAGE_ALPINE_VERSION="3.21.3"
+ARG MAIN_IMAGE_ALPINE_VERSION="3.22.0"
 ARG HEADSCALE_ADMIN_VERSION="0.25.6"
 
 # ---
diff --git a/README.md b/README.md
index 4e73512..004cec6 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Deploy [Headscale][headscale-wob] using a "serverless" immutable docker image wi
 
 | Tool | Upstream Repository | Version |
 |---|---|---|
-| [`Alpine Linux`][alpine-linux-wob] | [Alpine Linux Repo][alpine-linux-repo] | [`v3.21.3`](https://git.alpinelinux.org/aports/log/?h=v3.21.3) |
+| [`Alpine Linux`][alpine-linux-wob] | [Alpine Linux Repo][alpine-linux-repo] | [`v3.22.0`](https://git.alpinelinux.org/aports/log/?h=v3.22.0) |
 | [`Headscale`][headscale-wob] | [Headscale Repo][headscale-repo] | [`v0.26.0`](https://github.com/juanfont/headscale/releases/tag/v0.26.0) |
 | [`Headscale-Admin`][headscale-admin-wob] | [Headscale-Admin Repo][headscale-admin-repo] | [`v0.25.6`](https://github.com/GoodiesHQ/headscale-admin/releases/tag/v0.25.6) |
 | [`Litestream`][litestream-wob] | [Litestream Repo][litestream-repo] | [`v0.3.13`](https://github.com/benbjohnson/litestream/releases/tag/v0.3.13) |