diff --git a/fastlane/README.md b/fastlane/README.md
index 27d5d38c..79a20903 100644
--- a/fastlane/README.md
+++ b/fastlane/README.md
@@ -13,6 +13,14 @@ For _fastlane_ installation instructions, see [Installing _fastlane_](https://do
 
 # Available Actions
 
+### latest_build_number
+
+```sh
+[bundle exec] fastlane latest_build_number
+```
+
+Get latest TestFlight build number across all platforms
+
 ### bump_build
 
 ```sh