diff --git a/services/platform-service/src/server.ts b/services/platform-service/src/server.ts
index accc8380..9d0546ae 100644
--- a/services/platform-service/src/server.ts
+++ b/services/platform-service/src/server.ts
@@ -300,8 +300,11 @@ await app.register(
       '/devops/info',
       {
         preHandler: async (request, reply) => {
-          // Require admin role
-          const auth = (request as any).auth;
+          // Require admin role. The `auth` property is decorated onto the
+          // Fastify request by the auth preHandler upstream; cast through
+          // `unknown` to read it without `any` (a `declare module` augmentation
+          // would be cleaner but requires touching @bytelyst/fastify-auth).
+          const auth = (request as unknown as { auth?: { role?: string } }).auth;
           if (!auth || auth.role !== 'admin') {
             return reply.code(403).send({ error: 'Admin access required' });
           }