1 files changed, 6 insertions, 2 deletions
diff --git a/repos/base.py b/repos/base.py
index 3537f05..c20853a 100644
--- a/repos/base.py
+++ b/repos/base.py
@@ -11,14 +11,18 @@ import semver
 
 __all__ = [
     'Repository',
+    'slug',
     'Version',
 ]
 
 HTTP_DATE = '%a, %d %b %Y %H:%M:%S GMT'
 SLUGIFY = re.compile(r'\W+')
 
-def slug(text: str) -> str:
-    return SLUGIFY.sub('-', text.lower()).strip('-')
+def slug(text: Optional[str]) -> str:
+    if text is None:
+        return ''
+    else:
+        return SLUGIFY.sub('-', text.lower()).strip('-')
 
 @total_ordering
 @dataclass()