diff --git a/Casks/emacs-app-nightly/meta.json b/Casks/emacs-app-nightly/meta.json
index 04b24f6b..289a30f3 100644
--- a/Casks/emacs-app-nightly/meta.json
+++ b/Casks/emacs-app-nightly/meta.json
@@ -7,12 +7,12 @@
   ],
   "desc": "GNU Emacs text editor (nightly build)",
   "homepage": "https://github.com/jimeh/emacs-builds",
-  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-08-31.8761d30.master/Emacs.2021-08-31.8761d30.master.macOS-10-15.x86_64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-09-01.f85b867.master/Emacs.2021-09-01.f85b867.master.macOS-10-15.x86_64.dmg",
   "appcast": null,
-  "version": "2021-08-31.8761d30.master",
+  "version": "2021-09-01.f85b867.master",
   "installed": null,
   "outdated": false,
-  "sha256": "15efc0d319edc159f8d868443b2332285b865736852840cfbfd4946e86707cfe",
+  "sha256": "109cd7ca65502d242242a453acef25b821b0f77561bec368662369fc6beda8ac",
   "artifacts": [
     [
       "Emacs.app"
diff --git a/Casks/emacs-app-nightly/shield.json b/Casks/emacs-app-nightly/shield.json
index fe835ea1..80c452e9 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": "2021-08-31.8761d30.master"
+  "message": "2021-09-01.f85b867.master"
 }