diff --git a/one-container/docker-compose.yaml b/one-container/docker-compose.yaml
index 8bd087e..d822d91 100644
--- a/one-container/docker-compose.yaml
+++ b/one-container/docker-compose.yaml
@@ -1,4 +1,4 @@
-version: '2'
+version: '3.0'
 
 volumes:
   etc_pihole-unbound: