diff --git a/config/configuration.yaml b/config/configuration.yaml
index 93e7268..268a261 100644
--- a/config/configuration.yaml
+++ b/config/configuration.yaml
@@ -27,6 +27,7 @@ http:
     - 192.168.0.80
     - 192.168.0.27
     - 172.23.0.0/24
+    - 172.21.0.0/24
 
 lovelace:
   mode: yaml