diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index 7733013e..1daaa3ff 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 '2025-08-16.23b766b.master'
+  version '2025-08-17.888dc2a.master'
 
   on_arm do
-    sha256 '1dcdebdd72b846d07f237b44ba3fefff937261f3871b2ff52537fcb151c2682e'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-08-16.23b766b.master/Emacs.2025-08-16.23b766b.master.macOS-11.arm64.dmg'
+    sha256 '32ade2410a55656cb46e02d863678c95c8cf5405dca1728c9ea1ddff7bd1b292'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-08-17.888dc2a.master/Emacs.2025-08-17.888dc2a.master.macOS-11.arm64.dmg'
     depends_on macos: '>= :big_sur'
   end
   on_intel do
-    sha256 'f2e83f0bb02dce91575a024e8aebfbcd3f680232200c99c07f7afc0624d7c64a'
-    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-08-16.23b766b.master/Emacs.2025-08-16.23b766b.master.macOS-11.x86_64.dmg'
+    sha256 '135889569da5611b7a08de6b074f7aac27257a712e23a2173ff7d3a6391af02b'
+    url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-08-17.888dc2a.master/Emacs.2025-08-17.888dc2a.master.macOS-11.x86_64.dmg'
     depends_on macos: '>= :big_sur'
   end