diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 353a2f9e..a784bb3d 100644
--- a/Casks/emacs-app-nightly.rb
+++ b/Casks/emacs-app-nightly.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 cask 'emacs-app-nightly' do
-  version '2023-04-20.c4e038c.master'
+  version '2023-04-21.42def84.master'
 
-  sha256 '0ef5ba0a6c8c30317d72e8f267c655108f08ea5919ceefdd2bd958bca76cf0da'
-  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2023-04-20.c4e038c.master/Emacs.2023-04-20.c4e038c.master.macOS-11.x86_64.dmg'
+  sha256 '19bed994e136b4ed18d31136f9bc2ee8d52445aa994a664c60f0358c02937b65'
+  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2023-04-21.42def84.master/Emacs.2023-04-21.42def84.master.macOS-11.x86_64.dmg'
 
   name 'Emacs'
   desc 'GNU Emacs text editor (nightly build)'