diff --git a/functions/src/index.ts b/functions/src/index.ts
index 99a6e85..db89fe4 100644
--- a/functions/src/index.ts
+++ b/functions/src/index.ts
@@ -90,7 +90,7 @@ export const accessFile = onRequest({
       return;
     }
 
-    const expirationMs = 30 * 24 * 60 * 60 * 1000;
+    const expirationMs = 60 * 60 * 1000;
 
     const bucket = getStorage().bucket();
     const file = bucket.file(filePath);