diff --git a/src/solid/auth.py b/src/solid/auth.py
index 008daae..76b55f0 100644
--- a/src/solid/auth.py
+++ b/src/solid/auth.py
@@ -21,7 +21,9 @@ def login(self, idp, username, password):
         }
 
         r = self.client.post(url, data=data)
-        r.raise_for_status()
+
+        if not r.is_redirect:
+            r.raise_for_status()
 
         if not self.is_login:
             raise Exception('Cannot login.')