diff --git a/README.md b/README.md
index 26633aa..c83b336 100644
--- a/README.md
+++ b/README.md
@@ -4,5 +4,13 @@ Container images for CNPG with the pgvecto.rs extension installed
 
 > [!IMPORTANT]
 > If you are using this image on an existing database, the postgres configuration needs to be 
-> altered to enable the extension. You can do this by running:
-> `psql -U postgres -c 'ALTER SYSTEM SET shared_preload_libraries = "vectors.so"'`
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+> altered to enable the extension. You can do this by setting shared_preload_libraries in your Cluster spec:
+> ```yaml
+>   apiVersion: postgresql.cnpg.io/v1
+>   kind: Cluster
+>   spec:
+>     (...)
+>     postgresql:
+>       shared_preload_libraries:
+>         - "vectors.so"
+>   ```
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