diff --git a/Dockerfile b/Dockerfile
index 8c91f47..e7d880f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,7 +28,7 @@ ENV NODE_ENV=production
 
 RUN npm run build
 
-FROM alpine:3.20
+FROM alpine:3.21
 
 RUN apk update && apk add ca-certificates curl && rm -rf /var/cache/apk/*
 
diff --git a/Dockerfile.release b/Dockerfile.release
index 55e09d3..c69c730 100644
--- a/Dockerfile.release
+++ b/Dockerfile.release
@@ -1,7 +1,7 @@
 # SPDX-FileCopyrightText: 2023 Steffen Vogel <post@steffenvogel.de>
 # SPDX-License-Identifier: Apache-2.0
 
-FROM alpine:3.20
+FROM alpine:3.21
 
 RUN apk update && apk add ca-certificates curl && rm -rf /var/cache/apk/*