diff --git a/app/zeus.py b/app/zeus.py
index fda87b3..2421a1b 100644
--- a/app/zeus.py
+++ b/app/zeus.py
@@ -15,7 +15,7 @@ zeus = oauth.remote_app(
     consumer_key=app.config['ZEUS_KEY'],
     consumer_secret=app.config['ZEUS_SECRET'],
     request_token_params={},
-    base_url='http://kelder.zeus.ugent.be/oauth/api/',
+    base_url='https://kelder.zeus.ugent.be/oauth/api/',
     access_token_method='POST',
     access_token_url='https://kelder.zeus.ugent.be/oauth/oauth2/token/',
     authorize_url='https://kelder.zeus.ugent.be/oauth/oauth2/authorize/'