diff --git a/buildbot_gitea/auth.py b/buildbot_gitea/auth.py
index 1b74282..eb8f1d5 100644
--- a/buildbot_gitea/auth.py
+++ b/buildbot_gitea/auth.py
@@ -1,5 +1,5 @@
 from buildbot.www.oauth2 import OAuth2Auth
-import urllib.parse
+from urllib.parse import urljoin
 
 class GiteaAuth(OAuth2Auth):
     name = 'Gitea'
@@ -8,8 +8,8 @@ class GiteaAuth(OAuth2Auth):
     def __init__(self, endpoint, client_id, client_secret):
         super(__class__, self).__init__(client_id, client_secret)
         self.resourceEndpoint = endpoint
-        self.authUri = urllib.parse.urljoin(endpoint, 'login/oauth/authorize')
-        self.tokenUri = urllib.parse.urljoin(endpoint, 'login/oauth/access_token')
+        self.authUri = urljoin(endpoint, 'login/oauth/authorize')
+        self.tokenUri = urljoin(endpoint, 'login/oauth/access_token')
 
     def getUserInfoFromOAuthClient(self, c):
         return self.get(c, '/api/v1/user')
\ No newline at end of file