diff --git a/Casks/emacs-app-good/meta.json b/Casks/emacs-app-good/meta.json
index 2ab3106b..a5f731dd 100644
--- a/Casks/emacs-app-good/meta.json
+++ b/Casks/emacs-app-good/meta.json
@@ -130,7 +130,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-good.rb",
   "ruby_source_checksum": {
diff --git a/Casks/emacs-app-monthly/meta.json b/Casks/emacs-app-monthly/meta.json
index df5334a8..ba6baeb1 100644
--- a/Casks/emacs-app-monthly/meta.json
+++ b/Casks/emacs-app-monthly/meta.json
@@ -129,7 +129,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-monthly.rb",
   "ruby_source_checksum": {
diff --git a/Casks/emacs-app-nightly-28/meta.json b/Casks/emacs-app-nightly-28/meta.json
index b0b83f2d..87016e0c 100644
--- a/Casks/emacs-app-nightly-28/meta.json
+++ b/Casks/emacs-app-nightly-28/meta.json
@@ -130,7 +130,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly-28.rb",
   "ruby_source_checksum": {
diff --git a/Casks/emacs-app-nightly-29/meta.json b/Casks/emacs-app-nightly-29/meta.json
index 4f00d5d1..da6f1939 100644
--- a/Casks/emacs-app-nightly-29/meta.json
+++ b/Casks/emacs-app-nightly-29/meta.json
@@ -130,7 +130,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly-29.rb",
   "ruby_source_checksum": {
diff --git a/Casks/emacs-app-nightly/meta.json b/Casks/emacs-app-nightly/meta.json
index de918129..82e49ddf 100644
--- a/Casks/emacs-app-nightly/meta.json
+++ b/Casks/emacs-app-nightly/meta.json
@@ -8,9 +8,9 @@
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   "desc": "GNU Emacs text editor (nightly build)",
   "homepage": "https://github.com/jimeh/emacs-builds",
-  "url": null,
-  "url_specs": null,
-  "version": "2025-12-14.5fe0b9e.master",
+  "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",
+  "url_specs": {},
+  "version": "2025-12-15.4aff16b.master",
   "autobump": true,
   "no_autobump_message": null,
   "skip_livecheck": false,
@@ -19,7 +19,7 @@
   "bundle_version": null,
   "bundle_short_version": null,
   "outdated": false,
-  "sha256": null,
+  "sha256": "b879933a3b2ba66daa762fe37a5f00bc34bef86797f13c8a02916f00e4d21fa9",
   "artifacts": [
     {
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@@ -98,7 +98,7 @@
   "depends_on": {
     "macos": {
       ">=": [
-        "10.15"
+        "11"
       ]
     }
   },
@@ -130,10 +130,10 @@
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   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly.rb",
   "ruby_source_checksum": {
-    "sha256": "18a09df434f1062c25f16fe9a1e5118d5431b958b5466667a693d810345bfad2"
+    "sha256": "b3c2bf1317e0761b396c90e5584742cff5515cde248f833d2c695cf9299df777"
   }
 }
diff --git a/Casks/emacs-app-nightly/shield.json b/Casks/emacs-app-nightly/shield.json
index 2bb85332..ee3fbf96 100644
--- a/Casks/emacs-app-nightly/shield.json
+++ b/Casks/emacs-app-nightly/shield.json
@@ -5,5 +5,5 @@
   "namedLogo": "GNU Emacs",
   "logoColor": "white",
   "label": "nightly",
-  "message": "2025-12-14.5fe0b9e.master"
+  "message": "2025-12-15.4aff16b.master"
 }
diff --git a/Casks/emacs-app-pretest/meta.json b/Casks/emacs-app-pretest/meta.json
index 835ff273..056e72c6 100644
--- a/Casks/emacs-app-pretest/meta.json
+++ b/Casks/emacs-app-pretest/meta.json
@@ -130,7 +130,7 @@
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   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-pretest.rb",
   "ruby_source_checksum": {
diff --git a/Casks/emacs-app/meta.json b/Casks/emacs-app/meta.json
index 79d60388..40bf8e7f 100644
--- a/Casks/emacs-app/meta.json
+++ b/Casks/emacs-app/meta.json
@@ -130,7 +130,7 @@
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   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "93cf330a4bf3228b8d518a5a469ddb54783fd2cb",
+  "tap_git_head": "68d9d254deb452a003150c05827626d722f0cc1c",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app.rb",
   "ruby_source_checksum": {