diff --git a/youtube_dl/extractor/gorillavid.py b/youtube_dl/extractor/gorillavid.py
index 1024a5c22..1a42de2d5 100644
--- a/youtube_dl/extractor/gorillavid.py
+++ b/youtube_dl/extractor/gorillavid.py
@@ -10,6 +10,7 @@
 )
 from ..utils import (
     ExtractorError,
+    encode_dict,
     int_or_none,
 )
 
@@ -88,7 +89,7 @@ def _real_extract(self, url):
             if countdown:
                 self._sleep(countdown, video_id)
 
-            post = compat_urllib_parse.urlencode(fields)
+            post = compat_urllib_parse.urlencode(encode_dict(fields))
 
             req = compat_urllib_request.Request(url, post)
             req.add_header('Content-type', 'application/x-www-form-urlencoded')