diff --git a/templates/datasources.yaml.j2 b/templates/datasources.yaml.j2
index aee724c..4b38f83 100644
--- a/templates/datasources.yaml.j2
+++ b/templates/datasources.yaml.j2
@@ -1,4 +1,5 @@
 apiVersion: 1
+prune: true
 datasources:
   - name: trickster
     type: prometheus