Use the latest micro instance from the free tier

website/source/intro/getting-started/build-image.html.markdown

@@ -55,7 +55,7 @@ briefly. Create a file `example.json` and fill it with the following contents:
     "secret_key": "{{user `aws_secret_key`}}",
     "region": "us-east-1",
     "source_ami": "ami-de0d9eb7",
-    "instance_type": "t1.micro",
+    "instance_type": "t2.micro",
     "ssh_username": "ubuntu",
     "ami_name": "packer-example {{timestamp}}"
   }]