diff --git a/searx/engines/wolframalpha_noapi.py b/searx/engines/wolframalpha_noapi.py
index 3ebbc4196..639dccf24 100644
--- a/searx/engines/wolframalpha_noapi.py
+++ b/searx/engines/wolframalpha_noapi.py
@@ -90,6 +90,6 @@ def response(resp):
     if not result_chunks:
         return []
 
-    return [{'url': resp.request.headers['Referer'],
+    return [{'url': resp.request.headers['Referer'].decode('utf-8'),
              'title': 'Wolframalpha',
              'content': ''.join(result_chunks)}]