diff --git a/packages/extension-sdk/README.md b/packages/extension-sdk/README.md
index ea22efddf..8ee037d7f 100644
--- a/packages/extension-sdk/README.md
+++ b/packages/extension-sdk/README.md
@@ -48,8 +48,8 @@ import {
 
 The following create methods are also available
 
-- `LookerExtensionSDK.createClient(extensionSDK)` creates a Looker31SDK instance.
-- `LookerExtensionSDK.create31Client(extensionSDK)` creates a Looker31SDK instance.
+- `LookerExtensionSDK.createClient(extensionSDK)` creates a Looker40SDK instance.
+- `LookerExtensionSDK.create31Client(extensionSDK)` creates a Looker31SDK instance, which is deprecated.
 
 #### Connection configuration