diff --git a/Casks/emacs-app-nightly/meta.json b/Casks/emacs-app-nightly/meta.json
index 61e8c10b..d3325c5d 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.2021-10-15.ca3d723.master/Emacs.2021-10-15.ca3d723.master.macOS-10-15.x86_64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-10-17.3852784.master/Emacs.2021-10-17.3852784.master.macOS-10-15.x86_64.dmg",
   "appcast": null,
-  "version": "2021-10-15.ca3d723.master",
+  "version": "2021-10-17.3852784.master",
   "versions": {},
   "installed": null,
   "outdated": false,
-  "sha256": "8e30f3a8a52486bee0eb3b0eb1f299d593e3eb3d530de2727da6de97d7529972",
+  "sha256": "5b59be2d49735f3db7f8cbdcea3f3173ba9fe094aca27b8dcca58a45731cbbe1",
   "artifacts": [
     [
       "Emacs.app"
diff --git a/Casks/emacs-app-nightly/shield.json b/Casks/emacs-app-nightly/shield.json
index ca398b2d..a157e7d3 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": "2021-10-15.ca3d723.master"
+  "message": "2021-10-17.3852784.master"
 }