diff --git a/Casks/emacs-app-nightly-28/meta.json b/Casks/emacs-app-nightly-28/meta.json
index 5bc1e522..d09a6ec2 100644
--- a/Casks/emacs-app-nightly-28/meta.json
+++ b/Casks/emacs-app-nightly-28/meta.json
@@ -7,13 +7,13 @@
   ],
   "desc": "GNU Emacs text editor (nightly build of emacs-28 branch)",
   "homepage": "https://github.com/jimeh/emacs-builds",
-  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-12-27.c0815ac.emacs-28/Emacs.2021-12-27.c0815ac.emacs-28.macOS-10-15.x86_64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-12-28.06dcd2b.emacs-28/Emacs.2021-12-28.06dcd2b.emacs-28.macOS-10-15.x86_64.dmg",
   "appcast": null,
-  "version": "2021-12-27.c0815ac.emacs-28",
+  "version": "2021-12-28.06dcd2b.emacs-28",
   "versions": {},
   "installed": null,
   "outdated": false,
-  "sha256": "337a34582d995d59e0048d8db4de246c9ba9056d67d9dc636225ab0d3f84cca2",
+  "sha256": "f30613dc547ede052a2092139522728fd761666f22a52533dd434274e093263c",
   "artifacts": [
     [
       "Emacs.app"
diff --git a/Casks/emacs-app-nightly-28/shield.json b/Casks/emacs-app-nightly-28/shield.json
index a3cf7fa5..c49a7dd8 100644
--- a/Casks/emacs-app-nightly-28/shield.json
+++ b/Casks/emacs-app-nightly-28/shield.json
@@ -5,5 +5,5 @@
   "namedLogo": "GNU Emacs",
   "logoColor": "white",
   "label": "nightly@emacs-28",
-  "message": "2021-12-27.c0815ac.emacs-28"
+  "message": "2021-12-28.06dcd2b.emacs-28"
 }