diff --git a/README.md b/README.md
index 7d9dd05..9dd4bce 100644
--- a/README.md
+++ b/README.md
@@ -156,8 +156,12 @@ cargo build --release -p lldap -p migration-tool
 The resulting binaries will be in `./target/release/`. Alternatively, you can
 just run `cargo run -- run` to run the server.
 
-To bring up the server, you'll need to compile the frontend. You can build the
-frontend files with `./app/build.sh` (you'll need to run
+To bring up the server, you'll need to compile the frontend. In addition to
+cargo, you'll need:
+
+- WASM-pack: `cargo install wasm-pack`
+
+Then you can build the frontend files with `./app/build.sh` (you'll need to run
 this after every front-end change to update the WASM package served).
 
 The default config is in `src/infra/configuration.rs`, but you can override it