diff --git a/Casks/emacs-app-nightly/meta.json b/Casks/emacs-app-nightly/meta.json
index 82cf147d..54b7bf74 100644
--- a/Casks/emacs-app-nightly/meta.json
+++ b/Casks/emacs-app-nightly/meta.json
@@ -7,13 +7,13 @@
   ],
   "desc": "GNU Emacs text editor (nightly build)",
   "homepage": "https://github.com/jimeh/emacs-builds",
-  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-12-08.63f07ea.master/Emacs.2021-12-08.63f07ea.master.macOS-10-15.x86_64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-12-09.c0b9041.master/Emacs.2021-12-09.c0b9041.master.macOS-10-15.x86_64.dmg",
   "appcast": null,
-  "version": "2021-12-08.63f07ea.master",
+  "version": "2021-12-09.c0b9041.master",
   "versions": {},
   "installed": null,
   "outdated": false,
-  "sha256": "1e2dd8fe62891c98a706d8bfe34321bf39ccaa030a95f9257d132ffdf467c74d",
+  "sha256": "439e1fe8c90c440a40c335d5928a3f0f53a38898e64976ccb97f0b0e3d207962",
   "artifacts": [
     [
       "Emacs.app"
diff --git a/Casks/emacs-app-nightly/shield.json b/Casks/emacs-app-nightly/shield.json
index 2878b6ae..4ea7a0f7 100644
--- a/Casks/emacs-app-nightly/shield.json
+++ b/Casks/emacs-app-nightly/shield.json
@@ -5,5 +5,5 @@
   "namedLogo": "GNU Emacs",
   "logoColor": "white",
   "label": "nightly",
-  "message": "2021-12-08.63f07ea.master"
+  "message": "2021-12-09.c0b9041.master"
 }