diff --git a/theatre/README.md b/theatre/README.md
new file mode 100644
index 0000000..c008567
--- /dev/null
+++ b/theatre/README.md
@@ -0,0 +1,6 @@
+## How to deploy
+
+Simply update the version of `theatre/package.json`, then run `$ yarn run deploy`. This script will:
+1. Update the version of `@theatre/core` and `@theatre/studio`.
+2. Bundle the `.js` and `.dts` files.
+3. Publish both packages to npm.
\ No newline at end of file
diff --git a/theatre/devEnv/ensurePublishing.js b/theatre/devEnv/ensurePublishing.js
index 531bd14..55983cf 100644
--- a/theatre/devEnv/ensurePublishing.js
+++ b/theatre/devEnv/ensurePublishing.js
@@ -1,5 +1,5 @@
 if (process.env.THEATRE_IS_PUBLISHING !== 'true') {
   throw Error(
-    `This script may run only when the "prepare" command in root/theatre is running.`,
+    `This script may run only when the "deploy" command in root/theatre is running.`,
   )
 }