diff --git a/lib/constructs/backup-verification.ts b/lib/constructs/backup-verification.ts
index 8200951..0da7d9e 100644
--- a/lib/constructs/backup-verification.ts
+++ b/lib/constructs/backup-verification.ts
@@ -28,6 +28,7 @@ export class BackupVerification extends Construct {
       handler: "handler",
       index: "app.py",
       memorySize: 512,
+      ephemeralStorageSize: cdk.Size.gibibytes(4),
       timeout: cdk.Duration.minutes(5),
       environment: {
         SOURCE_BUCKET: props.sourceBucket.bucketName,