diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index e570c98c..6ee49a73 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 '2023-12-19.f248960.master'
+  version '2023-12-20.b088cf0.master'
 
-  sha256 '92a1a815414fb940535a654e6ed8507c01ad0f31ea652246c1348f3b5b19f6f2'
-  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2023-12-19.f248960.master/Emacs.2023-12-19.f248960.master.macOS-12.x86_64.dmg'
+  sha256 'd39a94de14c2ed4d36231e5b2cf5f0847e9450ce9bd96e475ce90611211bdb1d'
+  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2023-12-20.b088cf0.master/Emacs.2023-12-20.b088cf0.master.macOS-12.x86_64.dmg'
   depends_on macos: '>= :monterey'
 
   livecheck do