diff --git a/templates/wifi.yaml b/templates/wifi.yaml
index d1938d8..84b390e 100644
--- a/templates/wifi.yaml
+++ b/templates/wifi.yaml
@@ -20,6 +20,7 @@ text_sensor:
 wifi:
   ssid: !secret wifi_ssid
   password: !secret wifi_password
+  min_auth_mode: WPA2
   # Used for uploading, and our DNS server understands unqualified queries.
   domain: ""
   # Require reliable WiFi connection for IoT.