diff --git a/src/main/java/org/fachschaften/keycloak/form_extensions/SignupFormAction.java b/src/main/java/org/fachschaften/keycloak/form_extensions/SignupFormAction.java
index 621a78cdbd0df921c95732cc8e456a878b3eef8f..9effc2bb24da0a71a6b93555c86cdf69a37ddead 100644
--- a/src/main/java/org/fachschaften/keycloak/form_extensions/SignupFormAction.java
+++ b/src/main/java/org/fachschaften/keycloak/form_extensions/SignupFormAction.java
@@ -60,6 +60,8 @@ public class SignupFormAction implements FormAction, FormActionFactory {
         "@uni-muenchen.de",
         "@uni-paderborn.de",
         "@upb.de",
+        "@rub.de",
+        "@ruhr-uni-bochum.de",
         // subdomains
         ".rwth-aachen.de",
         ".fsmpi.eu",
@@ -87,7 +89,8 @@ public class SignupFormAction implements FormAction, FormActionFactory {
         ".uni-muenchen.de",
         ".uni-paderborn.de",
         ".upb.de",
-
+        ".rub.de",
+        ".ruhr-uni-bochum.de",
     };
 
     @Override