diff --git a/Casks/emacs-app-nightly-28/shield.json b/Casks/emacs-app-nightly-28/shield.json
new file mode 100644
index 00000000..46f3bfb2
--- /dev/null
+++ b/Casks/emacs-app-nightly-28/shield.json
@@ -0,0 +1,9 @@
+{
+  "schemaVersion": 1,
+  "style": "flat",
+  "color": "#7F5AB6",
+  "namedLogo": "GNU Emacs",
+  "logoColor": "white",
+  "label": "nightly@emacs-28",
+  "message": "2021-10-22.efdffd8.emacs-28"
+}