diff --git a/app.yaml b/app.yaml
index 39a779f..ec2ddbb 100644
--- a/app.yaml
+++ b/app.yaml
@@ -1,6 +1,6 @@
 runtime: nodejs10
 env: standard
-instance_class: F4
+instance_class: F4_HIGHMEM
 automatic_scaling:
   max_idle_instances: 2
   max_concurrent_requests: 40