Handle string encoding in style maps properly

2 files changed, 2 insertions, 2 deletions

diff --git a/mammoth/docx/style_map.py b/mammoth/docx/style_map.py
index 9d2646a..bf851e9 100644
--- a/mammoth/docx/style_map.py
+++ b/mammoth/docx/style_map.py
@@ -15,7 +15,7 @@ def write_style_map(fileobj, style_map):
         content_types_xml = _generate_content_types_xml(zip_file.read_str(_content_types_path))
     
     update_zip(fileobj, {
-        _style_map_path: style_map,
+        _style_map_path: style_map.encode("utf8"),
         _relationships_path: relationships_xml,
         _content_types_path: content_types_xml,
     })
diff --git a/mammoth/zips.py b/mammoth/zips.py
index 4d77acb..432be5d 100644
--- a/mammoth/zips.py
+++ b/mammoth/zips.py
@@ -42,7 +42,7 @@ def update_zip(fileobj, files):
             names = set(source.namelist()) | set(files.keys())
             for name in names:
                 if name in files:
-                    contents = files[name].encode("utf8")
+                    contents = files[name]
                 else:
                     contents = source.read(name)
                 destination.writestr(name, contents)