diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 73619b1d..5d4ff565 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 '2025-12-15.4aff16b.master'
+  version '2025-12-16.26dcbd0.master'
 
   on_arm do
-    sha256 'b879933a3b2ba66daa762fe37a5f00bc34bef86797f13c8a02916f00e4d21fa9'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-15.4aff16b.master/Emacs.2025-12-15.4aff16b.master.macOS-11.arm64.dmg'
+    sha256 'f837d8f475f313f64518d8a83b6f689ab53117c6a7661803528bbcfe395cfc82'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-16.26dcbd0.master/Emacs.2025-12-16.26dcbd0.master.macOS-11.arm64.dmg'
     depends_on macos: '>= :big_sur'
   end
   on_intel do
-    sha256 '4aa78f5fb725933ae667f56f5126fc2034a9cc9e117b9e7cb7f2fe3d37142bd6'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-15.4aff16b.master/Emacs.2025-12-15.4aff16b.master.macOS-11.x86_64.dmg'
+    sha256 '812d16326da29254ea2c6a30694021470b008444facdbe1e33698d3f58639030'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-16.26dcbd0.master/Emacs.2025-12-16.26dcbd0.master.macOS-11.x86_64.dmg'
     depends_on macos: '>= :big_sur'
   end