diff --git a/src/channel.c b/src/channel.c
index a06c732..10e40e9 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -147,7 +147,7 @@ void channel_set(int idx, bool state) {
   if (s_channels[idx].led_gpio!=GPIO_INVALID)
     mgos_gpio_write(s_channels[idx].led_gpio, state);
 
-  mqtt_publish_stat("channel", "{\"idx\": %d, \"relay_state\": %d}", idx, channel_get(idx));
+  mqtt_publish_stat("channel", "{idx: %d, relay_state: %d}", idx, channel_get(idx));
 }
 
 bool channel_get(int idx) {
diff --git a/src/rpc.c b/src/rpc.c
index da98add..bd23ee6 100644
--- a/src/rpc.c
+++ b/src/rpc.c
@@ -49,7 +49,7 @@ static void rpc_channel_toggle_handler(struct mg_rpc_request_info *ri, void *cb_
     return;
 
   channel_handler(gpio, NULL);
-  mg_rpc_send_responsef(ri, "idx: %d, relay_state: %d", idx, channel_get(idx));
+  mg_rpc_send_responsef(ri, "{idx: %d, relay_state: %d}", idx, channel_get(idx));
   ri = NULL;
 
   (void) ri;
@@ -67,7 +67,7 @@ static void rpc_channel_get_handler(struct mg_rpc_request_info *ri, void *cb_arg
   if (!rpc_args_to_idx_and_gpio(ri, args, &idx, &gpio))
     return;
 
-  mg_rpc_send_responsef(ri, "idx: %d, relay_state: %d", idx, channel_get(idx));
+  mg_rpc_send_responsef(ri, "{idx: %d, relay_state: %d}", idx, channel_get(idx));
   ri = NULL;
 
   (void) ri;
@@ -103,7 +103,7 @@ static void rpc_channel_set_handler(struct mg_rpc_request_info *ri, void *cb_arg
   }
 
   channel_set(idx, (bool) value);
-  mg_rpc_send_responsef(ri, "idx: %d, relay_state: %d", idx, channel_get(idx));
+  mg_rpc_send_responsef(ri, "{idx: %d, relay_state: %d}", idx, channel_get(idx));
   ri = NULL;
 
   (void) ri;