diff --git a/src/models/Device.ts b/src/models/Device.ts
index f4ea4ee..ae03634 100644
--- a/src/models/Device.ts
+++ b/src/models/Device.ts
@@ -176,7 +176,7 @@ export class Device {
       case pond.DevicePlatform.DEVICE_PLATFORM_V2_WIFI_BLUE:
       case pond.DevicePlatform.DEVICE_PLATFORM_V2_CELLULAR_BLUE:
       case pond.DevicePlatform.DEVICE_PLATFORM_V2_ETHERNET_BLUE:
-        max = this.status.firmwareVersion >= "2.1.9" ? 4 : 2;
+        max = this.versionComparison(this.status.firmwareVersion, "2.1.9") ? 4 : 2;
     }
     return max
   }