diff --git a/resolver/Dockerfile b/resolver/Dockerfile
index 1f5425410c9206e31e7a65e67ff0d4bb78ac5cbb..1ff68e9ec7bdfd44f96ce907e9b4f1a26f49523d 100644
--- a/resolver/Dockerfile
+++ b/resolver/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.21
 # hadolint ignore=DL3018
 RUN echo '@testing http://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories && \
     apk add --update --no-cache \