diff --git a/Casks/emacs-app-nightly/meta.json b/Casks/emacs-app-nightly/meta.json
index a832498b..5761e535 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.2021-09-13.5a34b65.master/Emacs.2021-09-13.5a34b65.master.macOS-10-15.x86_64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-09-14.42b49e9.master/Emacs.2021-09-14.42b49e9.master.macOS-10-15.x86_64.dmg",
   "appcast": null,
-  "version": "2021-09-13.5a34b65.master",
+  "version": "2021-09-14.42b49e9.master",
   "versions": {},
   "installed": null,
   "outdated": false,
-  "sha256": "4d002e3bfdf764a380117b243003784303c46d03bd731f7aaf65924ed4d675d6",
+  "sha256": "4684d9c4ad6aa3daa90d4d922f3721d9cbfa31a37446e84314b8ca1c73357dcf",
   "artifacts": [
     [
       "Emacs.app"
diff --git a/Casks/emacs-app-nightly/shield.json b/Casks/emacs-app-nightly/shield.json
index 8768738b..deb61abd 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": "2021-09-13.5a34b65.master"
+  "message": "2021-09-14.42b49e9.master"
 }