diff --git a/cli/upgrade.ts b/cli/upgrade.ts
index 9b333411..e49268a6 100644
--- a/cli/upgrade.ts
+++ b/cli/upgrade.ts
@@ -24,6 +24,7 @@ export async function upgrade(version?: string): Promise<void> {
       "deno",
       "install",
       "-qAfr",
+      '--v8-flags="--max-old-space-size=48384,--max-heap-size=16384"',
       "--allow-read",
       "--allow-write",
       "--unstable",