diff --git a/.forgejo/testdata/build-release/Dockerfile b/.forgejo/testdata/build-release/Dockerfile
index 1116f459a9..d10564359e 100644
--- a/.forgejo/testdata/build-release/Dockerfile
+++ b/.forgejo/testdata/build-release/Dockerfile
@@ -1,4 +1,4 @@
-FROM data.forgejo.org/oci/alpine:3.20
+FROM data.forgejo.org/oci/alpine:3.21
 ARG RELEASE_VERSION=unkown
 LABEL maintainer="contact@forgejo.org" \
       org.opencontainers.image.version="${RELEASE_VERSION}"