diff --git a/messages/JsonMessages/MapDetailsData.ts b/messages/JsonMessages/MapDetailsData.ts
index ff18acc3..794c9bac 100644
--- a/messages/JsonMessages/MapDetailsData.ts
+++ b/messages/JsonMessages/MapDetailsData.ts
@@ -9,13 +9,13 @@ import { isNumber } from "generic-type-guard";
 
 export const isMapDetailsData = new tg.IsInterface()
     .withProperties({
-        roomSlug: tg.isOptional(tg.isString), // deprecated
         mapUrl: tg.isString,
         policy_type: isNumber, //isNumericEnum(GameRoomPolicyTypes),
         tags: tg.isArray(tg.isString),
         textures: tg.isArray(isCharacterTexture),
-        contactPage: tg.isUnion(tg.isString, tg.isUndefined),
-        authenticationMandatory: tg.isUnion(tg.isBoolean, tg.isUndefined),
+        authenticationMandatory: tg.isUnion(tg.isNullable(tg.isBoolean), tg.isUndefined),
+        roomSlug: tg.isNullable(tg.isString), // deprecated
+        contactPage: tg.isNullable(tg.isString),
         group: tg.isNullable(tg.isString),
     })
     .withOptionalProperties({
diff --git a/pusher/src/Controller/MapController.ts b/pusher/src/Controller/MapController.ts
index 3277bd84..00936b44 100644
--- a/pusher/src/Controller/MapController.ts
+++ b/pusher/src/Controller/MapController.ts
@@ -59,11 +59,11 @@ export class MapController extends BaseController {
                     JSON.stringify({
                         mapUrl,
                         policy_type: GameRoomPolicyTypes.ANONYMOUS_POLICY,
-                        roomSlug: "", // Deprecated
+                        roomSlug: null, // Deprecated
                         group: null,
                         tags: [],
                         textures: [],
-                        contactPage: undefined,
+                        contactPage: null,
                         authenticationMandatory: DISABLE_ANONYMOUS,
                     } as MapDetailsData)
                 );