diff --git a/src/types/microsoft-teams-sdk.d.ts b/src/types/microsoft-teams-sdk.d.ts
index 1f4b32c50ef..46331c890f1 100644
--- a/src/types/microsoft-teams-sdk.d.ts
+++ b/src/types/microsoft-teams-sdk.d.ts
@@ -41,7 +41,7 @@ declare module "@microsoft/teams.apps/dist/middleware/auth/jwt-validator.js" {
       options?: {
         validateServiceUrl?: { expectedServiceUrl: string } | undefined;
       },
-    ): Promise<unknown | null>;
+    ): Promise<object | null>;
   }
 
   export function createServiceTokenValidator(