diff --git a/README.md b/README.md
index 5947b84..7b29c5c 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,10 @@
 Implements the crypto interface used by js-libp2p-noise:
 https://github.com/ChainSafe/js-libp2p-noise/blob/master/src/crypto.ts
 
-Allows you to do the crypto operations in WASM.
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+Allows you to do the crypto operations in WASM.
+
+# Building
+
+```
+wasm-pack build --target nodejs --out-dir ./lib-wrapper/pkg_node
+```
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