diff --git a/Dockerfile b/Dockerfile
index 7300f8f..483d1e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ FROM golang:alpine as builder
 # flag -ldflags "-s -w" produces a smaller executable
 RUN go install -ldflags "-s -w" -v github.com/a8m/envsubst/cmd/envsubst@v1.3.0
 
-FROM alpine:3.17
+FROM alpine:3.18
 
 COPY --from=builder /go/bin/envsubst /usr/bin/envsubst