diff --git a/Dockerfile b/Dockerfile
index 04ee3a8..f0e4786 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ COPY . /build/
 RUN make
 
 # runtime image
-FROM alpine:3.17
+FROM alpine:3.18
 RUN apk add --no-cache ca-certificates
 # set up nsswitch.conf for Go's "netgo" implementation
 # - https://github.com/docker-library/golang/blob/1eb096131592bcbc90aa3b97471811c798a93573/1.14/alpine3.12/Dockerfile#L9