diff --git a/Dockerfile b/Dockerfile
index ee9c3d0..f0eea09 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,2 +1,2 @@
-FROM postgres:9.6
+FROM postgres:12
 COPY create-multiple-postgresql-databases.sh /docker-entrypoint-initdb.d/
diff --git a/README.md b/README.md
index 3db6ca3..d725fb7 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Using multiple databases with the official PostgreSQL Docker image
 
+**IMPORTANT:** This is a fork of an [original repository](https://github.com/mrts/docker-postgresql-multiple-databases). The only change I made here is to update the PostgreSQL version to v12.
+
 The [official recommendation](https://hub.docker.com/_/postgres/) for creating
 multiple databases is as follows: