diff --git a/src/impl/Event/router_v1.py b/src/impl/Event/router_v1.py
index 252f8cde..53505c4d 100644
--- a/src/impl/Event/router_v1.py
+++ b/src/impl/Event/router_v1.py
@@ -6,7 +6,7 @@
 from src.configuration.Configuration import Configuration
 from src.error.AuthenticationException import AuthenticationException
 from src.impl.Company.schema import CompanyGet
-from src.impl.Event.schema import EventCreate, HackerEventRegistration
+from src.impl.Event.schema import EventCreate, HackerEventRegistration, HackerEventRegistrationUpdate
 from src.impl.Event.schema import EventGet
 from src.impl.Event.schema import EventGetAll
 from src.impl.Event.schema import EventUpdate
@@ -142,6 +142,15 @@ def register_hacker(id: int,
     return {'success': True, 'event_id': event.id, 'user_id': hacker_id}
 
 
+@router.put("/{id}/update-register/{hacker_id}")
+def register_hacker(id: int,
+                    hacker_id: int,
+                    payload: HackerEventRegistrationUpdate,
+                    token: BaseToken = Depends(JWTBearer())):
+    event = event_service.update_register(id, hacker_id, payload, token)
+    return {'success': True, 'event_id': event.id, 'user_id': hacker_id}
+
+
 # @router.delete("/{id}/participants/{hacker_id}")
 # def remove_event_participant(id: int,
 #                                    hacker_id: int,
diff --git a/src/impl/Event/service.py b/src/impl/Event/service.py
index f6429aee..1b46aa59 100644
--- a/src/impl/Event/service.py
+++ b/src/impl/Event/service.py
@@ -227,6 +227,30 @@ def add_hacker(self, event_id: int, hacker_id: int,
         db.session.commit()
         db.session.refresh(event)
         return event
+    
+    @BaseService.needs_service(UserService)
+    def update_register(self, event_id: int, hacker_id: int,
+                   payload: HackerEventRegistration, data: BaseToken):
+        if not data.check([UserType.LLEIDAHACKER]) and not data.check(
+            [UserType.HACKER], hacker_id):
+            raise AuthenticationException("Not authorized")
+        event = self.get_by_id(event_id)
+        if event.archived:
+            raise InvalidDataException(
+                "Unable to operate with an archived event, unarchive it first")
+        if not data.is_admin:
+            if event.max_participants <= len(event.registered_hackers):
+                raise InvalidDataException("Event is full")
+        hacker = self.user_service.get_by_id(hacker_id)
+        if hacker not in event.registered_hackers:
+            raise InvalidDataException('Hacker is not registered')
+        reg = db.session.query(HackerEventRegistration).filter(HackerRegistration.user_id == hacker_id, HackerRegistration.event_id == event_id).first()
+        if reg is None:
+            raise InvalidDataException('Hacker is not registered')
+        set_existing_data(reg, payload)
+        db.session.commit()
+        db.session.refresh(event)
+        return event
 
     @BaseService.needs_service('HackerGroupService')
     def add_hacker_group(self, id: int, hacker_group_id: int, data: BaseToken):