diff --git a/serverless/aws/README.md b/serverless/aws/README.md
index 64ffa6a..038b498 100644
--- a/serverless/aws/README.md
+++ b/serverless/aws/README.md
@@ -4,7 +4,7 @@ See installation and configuration instructions at [Protomaps Docs: Deploy on AW
 
 ## Development
 
-The code for the lambda function imports from the top level `js/` directory. You will therfore need to first run `npm install` and `npm run build` in the `js/` directory, and then run `npm run build` in the `serverless/aws` directory.
+The code for the lambda function imports from the top level `js/` directory. You will therfore need to first run `npm install` and `npm run build` in the `js/` directory, and then run `npm install` in the `serverless/aws` directory.
 
 You should then be able to build the Lambda ZIP: