diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..0e2a13e
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1 @@
+FROM postgres:11.6
diff --git a/config b/config
index 1a2312f..b0b31fe 100644
--- a/config
+++ b/config
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-export POSTGRES_IMAGE=${POSTGRES_IMAGE:="postgres"}
-export POSTGRES_IMAGE_VERSION=${POSTGRES_IMAGE_VERSION:="11.6"}
+export POSTGRES_IMAGE=${POSTGRES_IMAGE:="$(awk -F '[ :]' '{print $2}' Dockerfile)"}
+export POSTGRES_IMAGE_VERSION=${POSTGRES_IMAGE_VERSION:="$(awk -F '[ :]' '{print $3}' Dockerfile)"}
 export POSTGRES_ROOT=${POSTGRES_ROOT:="$DOKKU_LIB_ROOT/services/postgres"}
 export POSTGRES_HOST_ROOT=${POSTGRES_HOST_ROOT:=$POSTGRES_ROOT}