X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/4e329824f40367945de11d3647396859092f5c2c..8fefa7358bf9f799c8a7d700b58a00362b26419e:/librarian/cover.py

diff --git a/librarian/cover.py b/librarian/cover.py
index 09c8071..c32751d 100644
--- a/librarian/cover.py
+++ b/librarian/cover.py
@@ -305,7 +305,7 @@ class WLCover(Cover):
             bg_src = None
             if bg_src is None:
                 bg_src = URLOpener().open(url)
-            self.background_img = StringIO(bg_src.read())
+            self.background_img = BytesIO(bg_src.read())
             bg_src.close()
 
     def pretty_author(self):