diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 5eb58b87..048df438 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 '2025-12-06.5e0414b.master'
+  version '2025-12-08.6caf598.master'
 
   on_arm do
-    sha256 '1d6bf7b9b777b19eabb7644aa6cf012ca68680bc3bdb6cee39312fb2b11543ed'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-06.5e0414b.master/Emacs.2025-12-06.5e0414b.master.macOS-11.arm64.dmg'
+    sha256 '816d3f3b21420c1774321ae5e3d06e917bf1b2ca46df2eefdef1798817a2768a'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-08.6caf598.master/Emacs.2025-12-08.6caf598.master.macOS-11.arm64.dmg'
     depends_on macos: '>= :big_sur'
   end
   on_intel do
-    sha256 'bb0d27a05f3f552f27715a14c3de788e92f8520145aee47113099d72c4d61cdc'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-06.5e0414b.master/Emacs.2025-12-06.5e0414b.master.macOS-11.x86_64.dmg'
+    sha256 '795acf33f39ec0303150122b32193b96d6db73070d93ff6686fd7ee5da279924'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-08.6caf598.master/Emacs.2025-12-08.6caf598.master.macOS-11.x86_64.dmg'
     depends_on macos: '>= :big_sur'
   end