diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 747b9f0d..f5383119 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 '2021-09-03.b66d461.master'
+  version '2021-09-04.1d36043.master'
 
-  sha256 '8853884e8ba09195b145f727679395b8038fad810a2b578e9f973873f8f5317b'
-  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-09-03.b66d461.master/Emacs.2021-09-03.b66d461.master.macOS-10-15.x86_64.dmg'
+  sha256 '7897bbc0ddc424e82c3749cd61f32fae0859c298fb01a82bac22eee07460ae96'
+  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2021-09-04.1d36043.master/Emacs.2021-09-04.1d36043.master.macOS-10-15.x86_64.dmg'
 
   name 'Emacs'
   desc 'GNU Emacs text editor (nightly build)'