diff --git a/external-dns/values.yaml b/external-dns/values.yaml
index 76e1156..1e42393 100644
--- a/external-dns/values.yaml
+++ b/external-dns/values.yaml
@@ -4,7 +4,7 @@ external-dns:
 
   image:
     pullPolicy: Always
-  txtPrefix: "dev"
+  txtPrefix: "dev-"
   sources:
     - service