diff --git a/README.md b/README.md
index 54f23f2..7df864f 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ Prerequisites
 1. The `wrangler` cli tool from Cloudflare
 2. node.js + npm
 3. rustc + cargo, with the latest nightly toolchain
+4. wasm-pack
 
 Deployment
 ===