diff --git a/twitchdl/utils.py b/twitchdl/utils.py
index a7724a8..5e1efa6 100644
--- a/twitchdl/utils.py
+++ b/twitchdl/utils.py
@@ -58,6 +58,6 @@ def slugify(value):
     re_pattern = re.compile(r'[^\w\s-]', flags=re.U)
     re_spaces = re.compile(r'[-\s]+', flags=re.U)
     value = str(value)
-    value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii')
+    value = unicodedata.normalize('NFKC', value)
     value = re_pattern.sub('', value).strip().lower()
-    return re_spaces.sub('-', value)
+    return re_spaces.sub('_', value)