diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 49b8fe83..7787a33d 100644
--- a/Casks/emacs-app-nightly.rb
+++ b/Casks/emacs-app-nightly.rb
@@ -5,16 +5,16 @@ cask 'emacs-app-nightly' do
   desc 'GNU Emacs text editor (nightly build)'
   homepage 'https://github.com/jimeh/emacs-builds'
 
-  version '2025-12-28.9419168.master'
+  version '2025-12-29.3e5c942.master'
 
   on_arm do
-    sha256 '46c966c931380d19cfdac9dd42216734bcbcdf0d708e36a5df53e7cc1233119a'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-28.9419168.master/Emacs.2025-12-28.9419168.master.macOS-11.arm64.dmg'
+    sha256 '4e87cc311a13e818be74898e3a895e4a0a553578052d37c9343cd303373e7e65'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-29.3e5c942.master/Emacs.2025-12-29.3e5c942.master.macOS-11.arm64.dmg'
     depends_on macos: '>= :big_sur'
   end
   on_intel do
-    sha256 '4b2fcb2cf9820ae4e5ecb1703df9f3fa65d1c8a9ee0653d32c3fe02baaa6c5e0'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-28.9419168.master/Emacs.2025-12-28.9419168.master.macOS-11.x86_64.dmg'
+    sha256 '84261c422fefc9a2cbfc574209dbbdcf1e5f2f988a2a2365841077f38f51112d'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-29.3e5c942.master/Emacs.2025-12-29.3e5c942.master.macOS-11.x86_64.dmg'
     depends_on macos: '>= :big_sur'
   end