diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 6342e2b7..c8ee5268 100644
--- a/Casks/emacs-app-nightly.rb
+++ b/Casks/emacs-app-nightly.rb
@@ -5,10 +5,10 @@ cask 'emacs-app-nightly' do
   desc 'GNU Emacs text editor (nightly build)'
   homepage 'https://github.com/jimeh/emacs-builds'
 
-  version '2024-07-20.55fefe0.master'
+  version '2024-07-21.ccb8561.master'
 
-  sha256 'd11429b9e13fb9f3535ffd2a8c736fdce38f624554611cd8ea69dd1783b04996'
-  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2024-07-20.55fefe0.master/Emacs.2024-07-20.55fefe0.master.macOS-12.x86_64.dmg'
+  sha256 'd286964fddd8e4931b37b7f3b0cf0bd2355f907fc5029ac61598f5ecf1ba1deb'
+  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2024-07-21.ccb8561.master/Emacs.2024-07-21.ccb8561.master.macOS-12.x86_64.dmg'
   depends_on macos: '>= :monterey'
 
   livecheck do