diff --git a/src/routes/channels.cpp b/src/routes/channels.cpp
index 6f2849c..f3bb74d 100644
--- a/src/routes/channels.cpp
+++ b/src/routes/channels.cpp
@@ -6,12 +6,12 @@ void onGetChannels(AsyncWebServerRequest *request, DMXESPSerial dmx1, DMXESPSeri
 
     for (int channel = 1; channel <= DMXCHANNELS; channel++)
     {
-        doc["dmx1"][channel] = dmx1.read(channel);
+        doc["dmx1"][String(channel)] = dmx1.read(channel);
     }
 
     for (int channel = 1; channel <= DMXCHANNELS; channel++)
     {
-        doc["dmx2"][channel] = dmx2.read(channel);
+        doc["dmx2"][String(channel)] = dmx2.read(channel);
     }
 
     String jsonBuffer;