diff --git a/Dockerfile b/Dockerfile
index e7a5948..1d702e9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 ARG CERT_PASSWORD
 ARG DOTNET_SDK_VERSION=9.0.308
 ARG DOTNET_RUNTIME_VERSION=9.0.11
-ARG ALPINE_VERSION=3.21
+ARG ALPINE_VERSION=3.22
 ARG CONFIG_DIRECTORY_ARG=/config
 FROM mcr.microsoft.com/dotnet/sdk:${DOTNET_SDK_VERSION}-alpine${ALPINE_VERSION}-amd64 AS build-env
 ARG CONFIG_DIRECTORY_ARG
diff --git a/README.md b/README.md
index 531a4fc..b45f328 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@ docker build --build-arg CERT_PASSWORD=supersecretpassword . -t net-base
 | CERT_PASSWORD                                       | The password for the generated certificate                              | N/A **(required)**                                                                           |
 | DOTNET_SDK_VERSION                                  | The [SDK](https://mcr.microsoft.com/en-us/artifact/mar/dotnet/sdk/tags) version used to generate the development certificate | 9.0.308                                 |
 | DOTNET_RUNTIME_VERSION                              | The [runtime](https://mcr.microsoft.com/en-us/artifact/mar/dotnet/aspnet/tags) version used as a base | 9.0.11                                                         |
-| ALPINE_VERSION                                      | The version of [alpine linux](https://www.alpinelinux.org/) used as a base| 3.21                                                                                       |
+| ALPINE_VERSION                                      | The version of [alpine linux](https://www.alpinelinux.org/) used as a base| 3.22                                                                                       |
 
 ## Security implications