diff --git a/src/app.d.ts b/src/app.d.ts
index c7c0ed1..7211502 100644
--- a/src/app.d.ts
+++ b/src/app.d.ts
@@ -6,7 +6,15 @@ declare global {
         // interface Locals {}
         // interface PageData {}
         // interface PageState {}
-        // interface Platform {}
+        interface Platform {
+            env: {
+                COUNTER: DurableObjectNamespace;
+            };
+            context: {
+                waitUntil(promise: Promise<any>): void;
+            };
+            caches: CacheStorage & { default: Cache };
+        }
     }
 }