diff --git a/advanced/esphome/nspanel_esphome_core.yaml b/advanced/esphome/nspanel_esphome_core.yaml
index 7702c61..b0af24a 100644
--- a/advanced/esphome/nspanel_esphome_core.yaml
+++ b/advanced/esphome/nspanel_esphome_core.yaml
@@ -18,7 +18,7 @@ substitutions:
   friendly_name: ${device_name}
   wifi_timeout: '15'
   ##### DON'T CHANGE THIS ######
-  version: "4.2.5"
+  version: "4.2.6dev"
   ##############################
 
 ##### External components #####