diff --git a/src/components/Admin/resources/competition/event/EventCreate.tsx b/src/components/Admin/resources/competition/event/EventCreate.tsx
index cddb3cfa..2b885fcd 100644
--- a/src/components/Admin/resources/competition/event/EventCreate.tsx
+++ b/src/components/Admin/resources/competition/event/EventCreate.tsx
@@ -35,7 +35,7 @@ export const EventCreate: FC = () => {
               <TextInput source="registration_link.url" fullWidth validate={required()} />
               <DateTimeInput source="registration_link.start" fullWidth validate={required()} />
               <DateTimeInput source="registration_link.end" fullWidth validate={required()} />
-              <TextInput source="registration_link.additional_info" fullWidth validate={required()} />
+              <TextInput source="registration_link.additional_info" fullWidth />
             </>
           </Labeled>
         )}
diff --git a/src/components/Admin/resources/competition/event/EventEdit.tsx b/src/components/Admin/resources/competition/event/EventEdit.tsx
index ae25bde3..c516ae20 100644
--- a/src/components/Admin/resources/competition/event/EventEdit.tsx
+++ b/src/components/Admin/resources/competition/event/EventEdit.tsx
@@ -37,7 +37,7 @@ export const EventEdit: FC = () => {
               <TextInput source="registration_link.url" fullWidth validate={required()} />
               <DateTimeInput source="registration_link.start" fullWidth validate={required()} />
               <DateTimeInput source="registration_link.end" fullWidth validate={required()} />
-              <TextInput source="registration_link.additional_info" fullWidth validate={required()} />
+              <TextInput source="registration_link.additional_info" fullWidth />
             </>
           </Labeled>
         )}
diff --git a/src/types/api/competition.ts b/src/types/api/competition.ts
index 8403bb0e..7eabf92c 100644
--- a/src/types/api/competition.ts
+++ b/src/types/api/competition.ts
@@ -21,7 +21,7 @@ export interface RegistrationLink {
   url: string
   start: string
   end: string
-  additional_info: string
+  additional_info: string | null
   event: Event
 }
 
diff --git a/src/types/api/generated/competition.ts b/src/types/api/generated/competition.ts
index e1ec32ba..7f9d0dae 100644
--- a/src/types/api/generated/competition.ts
+++ b/src/types/api/generated/competition.ts
@@ -12,7 +12,7 @@ export interface RegistrationLink {
   url: string
   start: string
   end: string
-  additional_info: string
+  additional_info: string | null
   event: any
 }