diff --git a/Dockerfile b/Dockerfile
index a20b9f1..1dbd805 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -144,7 +144,7 @@ ENV PGDATA=/var/lib/postgresql/data
 
 RUN install --verbose --directory --owner postgres --group postgres --mode 1777 "$PGDATA"
 
-VOLUME /var/lib/postgresql
+VOLUME /var/lib/postgresql/data
 
 COPY docker-entrypoint.sh docker-ensure-initdb.sh /usr/local/bin/