diff --git a/README.md b/README.md
index 7248a81..dab93b2 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,8 @@ any issues.
    brew tap jimeh/emacs-builds
    ```
 2. Install one of the available casks:
-   - `emacs-app-nightly` for the latest nightly build:
+   - `emacs-app-nightly` for the latest nightly build from Emacs' `master`
+     branch:
      ```
      brew install --cask emacs-app-nightly
      ```
@@ -103,6 +104,11 @@ any issues.
      ```
      brew install --cask emacs-app-good
      ```
+   - `emacs-app-nightly-28` for the latest Emacs 28.x nightly build from the
+     `emacs-28` branch:
+     ```
+     brew install --cask emacs-app-nightly-28
+     ```
    - `emacs-app` for the latest stable release of Emacs (does not include
      native-comp at time of writing):
      ```