diff --git a/docker/Dockerfile b/docker/Dockerfile
index bd0ca6c..b71e212 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.16.2
+FROM alpine:3.18.2 AS builder
 
 COPY Cargo.* /tmp/iptoasn/
 COPY src /tmp/iptoasn/src