diff --git a/youtube_dl/extractor/ivi.py b/youtube_dl/extractor/ivi.py
index 52b53bfebd..315ea03faf 100644
--- a/youtube_dl/extractor/ivi.py
+++ b/youtube_dl/extractor/ivi.py
@@ -91,10 +91,10 @@ class IviIE(InfoExtractor):
                     'contentid': video_id
                 }
             ]
-        }).encode()
+        })
 
         for site in (353, 183):
-            content_data = data % site
+            content_data = (data % site).encode()
             if site == 353:
                 try:
                     from Cryptodome.Cipher import Blowfish