diff --git a/pgvector/Dockerfile b/pgvector/Dockerfile
index 73d13aa..e65f6f8 100644
--- a/pgvector/Dockerfile
+++ b/pgvector/Dockerfile
@@ -1,4 +1,4 @@
-ARG PG_VERSION=18.1 ALPINE_VERSION=3.23
+ARG PG_VERSION=18.3 ALPINE_VERSION=3.23
 FROM postgres:${PG_VERSION}-alpine${ALPINE_VERSION} AS build
 
 ARG PGVECTOR_VERSION
@@ -10,6 +10,6 @@ WORKDIR pgvector
 RUN make
 RUN make install
 
-FROM postgres:alpine AS release
+FROM postgres:${PG_VERSION}-alpine${ALPINE_VERSION} AS release
 RUN rm -rf /usr/local
 COPY --from=build /usr/local /usr/local