diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ commands installed.
 To start the ChirpStack simply run:
 
 ```bash
-$ docker-compose up
+$ POSTGRES_USER=postgres docker-compose up
 ```
 
 After all the components have been initialized and started, you should be able
diff --git a/configuration/postgresql/initdb/001-init-chirpstack.sh b/configuration/postgresql/initdb/001-init-chirpstack.sh
old mode 100644
new mode 100755
diff --git a/configuration/postgresql/initdb/002-chirpstack_extensions.sh b/configuration/postgresql/initdb/002-chirpstack_extensions.sh
old mode 100644
new mode 100755