diff --git a/loops/bluebream.zcml b/loops/bluebream.zcml
index 3a4a23b..3ffc041 100644
--- a/loops/bluebream.zcml
+++ b/loops/bluebream.zcml
@@ -33,7 +33,6 @@
   <include package="zope.app.form.browser" />
   <include package="zope.app.basicskin" />
   <include package="zope.browsermenu" />
-  <include package="zope.principalregistry" />
   <include package="zope.authentication" />
   <include package="zope.securitypolicy" />
   <include package="zope.login" />
diff --git a/loops/server/main.py b/loops/server/main.py
index 382b212..54099a8 100644
--- a/loops/server/main.py
+++ b/loops/server/main.py
@@ -5,9 +5,11 @@
 import sys
 
 # module aliases - should be moved to loops.server.aliases
+# or removed after migration with zodbupdate
 from zope.securitypolicy import securitymap
 sys.modules['zope.app.securitypolicy.securitymap'] = securitymap
 
+from scopes.server import auth
 import waitress
 from zope.app.wsgi import config, getWSGIApplication
 
@@ -21,6 +23,7 @@ def main():
     zope_conf = getattr(config, 'zope_conf', 'zope.conf')
     print(f'starting loops server... - conf: {zope_conf}')
     app = getWSGIApplication(zope_conf)
+    auth.registerAuthUtility()
     run(app, config)
 
 if __name__ == '__main__':
diff --git a/loops/server/psu.py b/loops/server/psu.py
index 19a94fa..79dda4f 100644
--- a/loops/server/psu.py
+++ b/loops/server/psu.py
@@ -11,6 +11,7 @@
 
 import atexit
 import os
+from scopes.server import auth
 from transaction import commit, abort
 from zope.app import wsgi
 from zope.app.authentication.principalfolder import Principal
@@ -67,6 +68,7 @@ def setup(zope_conf=None, loopsRootPath=None, config=config):
     if conn is None:
         print(f'opening ZODB connection...')
         conn = db.open()
+    auth.registerAuthUtility()
     root = conn.root()['Application']
     setSite(root)
     sm = component.getSiteManager(root)