diff --git a/mesht_device.py b/mesht_device.py
index 2ac1b66..56aabdc 100644
--- a/mesht_device.py
+++ b/mesht_device.py
@@ -265,7 +265,11 @@ class MeshtDevice:
 
     async def recv(self):
         data = await self.transport.recv()
-        fr = pb.decode(data, FROMRADIO_SCHEMA)
+        try:
+            fr = pb.decode(data, FROMRADIO_SCHEMA)
+        except UnicodeDecodeError:
+            logger.error("Cannot decode msg with string")
+            fr = {}
         logger.debug(f"FromRadio: {fr}")
         self._maybe_store_channel(fr)
         self._maybe_store_lora_config(fr)
diff --git a/webExtensions/publicEndpoints.py b/webExtensions/publicEndpoints.py
index b676ac4..975ab27 100644
--- a/webExtensions/publicEndpoints.py
+++ b/webExtensions/publicEndpoints.py
@@ -70,7 +70,7 @@ class WebExtension:
                 headers = {
                     "Cache-Control": f"public, max-age={86400*7}"
                 }
-                return Response(content=img, media_type="image/png")
+                return Response(content=img, headers=headers, media_type="image/png")
             except:
                 traceback.print_exc()
                 raise HTTPException(status_code=404, detail="not found tile")
\ No newline at end of file