diff --git a/Containerfile b/Containerfile
index d693357..1ad12b6 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,4 +1,4 @@
-FROM docker.io/golang:1.22-alpine3.20 AS builder
+FROM docker.io/golang:1.22-alpine3.21 AS builder
 
 RUN apk --no-cache add \
     git \
@@ -11,7 +11,7 @@ WORKDIR $GOPATH/src/github.com/kelseyhightower/confd
 RUN git checkout 919444eb6cf721d198b2bb18581d0f0b3734d107
 RUN make
 
-FROM docker.io/thallian/alpine-s6:3.20-3.1.6.2
+FROM docker.io/thallian/alpine-s6:3.21-3.2.0.2
 
 COPY --from=builder /go/src/github.com/kelseyhightower/confd/bin/confd /bin/confd