diff --git a/src/PepperDash.Essentials.MobileControl/WebSocketServer/MobileControlWebsocketServer.cs b/src/PepperDash.Essentials.MobileControl/WebSocketServer/MobileControlWebsocketServer.cs
index 846a674a..012f948f 100644
--- a/src/PepperDash.Essentials.MobileControl/WebSocketServer/MobileControlWebsocketServer.cs
+++ b/src/PepperDash.Essentials.MobileControl/WebSocketServer/MobileControlWebsocketServer.cs
@@ -319,7 +319,15 @@ namespace PepperDash.Essentials.WebSocketServer
                     continue;
                 }
 
-                var ip = touchpanel.Touchpanel.ConnectedIps.Any(ipInfo => csIpAddress.IsInSameSubnet(System.Net.IPAddress.Parse(ipInfo.DeviceIpAddress), csSubnetMask)) ? csIpAddress.ToString() : processorIp;
+                var ip = touchpanel.Touchpanel.ConnectedIps.Any(ipInfo =>
+                {
+                    if (System.Net.IPAddress.TryParse(ipInfo.DeviceIpAddress, out var parsedIp))
+                    {
+                        return csIpAddress.IsInSameSubnet(parsedIp, csSubnetMask);
+                    }
+                    this.LogWarning("Invalid IP address: {deviceIpAddress}", ipInfo.DeviceIpAddress);
+                    return false;
+                }) ? csIpAddress.ToString() : processorIp;
 
                 var appUrl = $"http://{ip}:{_parent.Config.DirectServer.Port}/mc/app?token={touchpanel.Key}";