diff --git a/Casks/emacs-app-good/meta.json b/Casks/emacs-app-good/meta.json
index 0e2d20e6..7d7dde9b 100644
--- a/Casks/emacs-app-good/meta.json
+++ b/Casks/emacs-app-good/meta.json
@@ -130,7 +130,7 @@
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   "disable_replacement_cask": null,
-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
   "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 63ee0ced..33fea0c5 100644
--- a/Casks/emacs-app-monthly/meta.json
+++ b/Casks/emacs-app-monthly/meta.json
@@ -129,7 +129,7 @@
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   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
   "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 66a2eb85..60a45775 100644
--- a/Casks/emacs-app-nightly-28/meta.json
+++ b/Casks/emacs-app-nightly-28/meta.json
@@ -130,7 +130,7 @@
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   "disable_replacement_cask": null,
-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
   "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 80c88126..e67e5f12 100644
--- a/Casks/emacs-app-nightly-29/meta.json
+++ b/Casks/emacs-app-nightly-29/meta.json
@@ -130,7 +130,7 @@
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   "disable_replacement_cask": null,
-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
   "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 4a59caed..c1c1a641 100644
--- a/Casks/emacs-app-nightly/meta.json
+++ b/Casks/emacs-app-nightly/meta.json
@@ -8,9 +8,9 @@
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   "homepage": "https://github.com/jimeh/emacs-builds",
-  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-20.bc30310.master/Emacs.2025-12-20.bc30310.master.macOS-11.arm64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-12-21.366cbeb.master/Emacs.2025-12-21.366cbeb.master.macOS-11.arm64.dmg",
   "url_specs": {},
-  "version": "2025-12-20.bc30310.master",
+  "version": "2025-12-21.366cbeb.master",
   "autobump": true,
   "no_autobump_message": null,
   "skip_livecheck": false,
@@ -19,7 +19,7 @@
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   "bundle_short_version": null,
   "outdated": false,
-  "sha256": "777e25f086de5a9300909398b60d145c494c17458769704c1dc2d78f36fc4aff",
+  "sha256": "1e05355fa2110aa90dcbb88eeabee9747a9034d241f572858bb81d9378945d36",
   "artifacts": [
     {
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@@ -130,10 +130,10 @@
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-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly.rb",
   "ruby_source_checksum": {
-    "sha256": "7eddcb8c5aef4c2b819dd91e47e66b47b74358b268c4c80d561e0b680876c679"
+    "sha256": "f9bd3a600bfae0c9de6054ba8ddac3144cba8e5b1f0e0143f2627ddc11ced932"
   }
 }
diff --git a/Casks/emacs-app-nightly/shield.json b/Casks/emacs-app-nightly/shield.json
index b9b41622..3d7b39cf 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": "2025-12-20.bc30310.master"
+  "message": "2025-12-21.366cbeb.master"
 }
diff --git a/Casks/emacs-app-pretest/meta.json b/Casks/emacs-app-pretest/meta.json
index 909f869f..df181149 100644
--- a/Casks/emacs-app-pretest/meta.json
+++ b/Casks/emacs-app-pretest/meta.json
@@ -130,7 +130,7 @@
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-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
   "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 21cf008d..b45387f2 100644
--- a/Casks/emacs-app/meta.json
+++ b/Casks/emacs-app/meta.json
@@ -130,7 +130,7 @@
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   "disable_replacement_cask": null,
-  "tap_git_head": "3a9add929fa2f88bc6432315e50d1eecf9f61b27",
+  "tap_git_head": "0018d70e422781e845eb8867718f78f580b1c015",
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   "ruby_source_path": "Casks/emacs-app.rb",
   "ruby_source_checksum": {