diff --git a/app/api/auth/[...nextauth]/route.ts b/app/api/auth/[...nextauth]/route.ts
index 39c7c5ef..cbb2f693 100644
--- a/app/api/auth/[...nextauth]/route.ts
+++ b/app/api/auth/[...nextauth]/route.ts
@@ -107,7 +107,7 @@ export const authOptions: NextAuthOptions = {
         console.log('Raw roles from Keycloak:', roles);
 
         // Clean up roles by removing ROLE_ prefix and converting to lowercase
-        const cleanRoles = roles.map(role => 
+        const cleanRoles = roles.map((role: string) => 
           role.replace(/^ROLE_/, '').toLowerCase()
         );