diff --git a/Containerfile b/Containerfile
index c7131f3..3fc4021 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,4 +1,4 @@
-FROM docker.io/golang:1.13.14-alpine AS builder
+FROM docker.io/golang:1.21-alpine3.19 AS builder
 
 RUN apk --no-cache add \
     git \
@@ -8,7 +8,7 @@ RUN mkdir -p $GOPATH/src/github.com/kelseyhightower
 RUN git clone https://github.com/kelseyhightower/confd.git $GOPATH/src/github.com/kelseyhightower/confd
 
 WORKDIR $GOPATH/src/github.com/kelseyhightower/confd
-RUN git checkout v0.16.0
+RUN git checkout 919444eb6cf721d198b2bb18581d0f0b3734d107
 RUN make
 
 FROM docker.io/thallian/alpine-s6:3.19-3.1.6.2