diff --git a/pyproject.toml b/pyproject.toml
index 5be63ccd7c5235e3d735c037835889ee486ca1fd..a1b518307a593aaca9af20c67dc0027166e5a8cc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,11 +52,6 @@ django-dbsettings = "^1.0.0"
 django-material = "^1.6.0"
 
 [tool.poetry.extras]
-app-alsijil = ['AlekSIS-App-Alsijil']
-app-chronos = ['AlekSIS-App-Chronos']
-app-exlibris = ['AlekSIS-App-Exlibris']
-app-schild-nrw = ['AlekSIS-App-SchILD-NRW']
-app-untis = ['AlekSIS-App-Untis']
 ldap = ["django-auth-ldap"]
 
 [tool.poetry.dev-dependencies]