diff --git a/Casks/emacs-app-good/meta.json b/Casks/emacs-app-good/meta.json
index 9c98db44..6c3a7256 100644
--- a/Casks/emacs-app-good/meta.json
+++ b/Casks/emacs-app-good/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "2023-12-01.eec1142.master",
   "installed": null,
-  "installed_time": null,
   "outdated": false,
   "sha256": "09bbb4e29f6b81a553b2b2dcad74a2be2db4049c36de5409c5436066c37deecd",
   "artifacts": [
diff --git a/Casks/emacs-app-monthly/meta.json b/Casks/emacs-app-monthly/meta.json
index 83ee3d77..51ed94e5 100644
--- a/Casks/emacs-app-monthly/meta.json
+++ b/Casks/emacs-app-monthly/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "2023-12-01.eec1142.master",
   "installed": null,
-  "installed_time": null,
   "outdated": false,
   "sha256": "09bbb4e29f6b81a553b2b2dcad74a2be2db4049c36de5409c5436066c37deecd",
   "artifacts": [
diff --git a/Casks/emacs-app-nightly-28/meta.json b/Casks/emacs-app-nightly-28/meta.json
index 66bbdd4a..d54f6f60 100644
--- a/Casks/emacs-app-nightly-28/meta.json
+++ b/Casks/emacs-app-nightly-28/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "2022-12-19.ae9bfed.emacs-28",
   "installed": null,
-  "installed_time": null,
   "outdated": false,
   "sha256": "28e611692ed2a09435a3225fa38a550954651cc8f3b116b571bd06b00dce458a",
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diff --git a/Casks/emacs-app-nightly-29/meta.json b/Casks/emacs-app-nightly-29/meta.json
index 1407ac4f..9605aad8 100644
--- a/Casks/emacs-app-nightly-29/meta.json
+++ b/Casks/emacs-app-nightly-29/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "2023-11-14.5a1808d.emacs-29",
   "installed": null,
-  "installed_time": null,
   "outdated": false,
   "sha256": "5b346a87ef0ba7f6e46d2dbad4253ea0d1d0ecbcf8abba8274c480061cad7784",
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diff --git a/Casks/emacs-app-nightly/meta.json b/Casks/emacs-app-nightly/meta.json
index f32cc431..38f5388f 100644
--- a/Casks/emacs-app-nightly/meta.json
+++ b/Casks/emacs-app-nightly/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "2023-12-19.f248960.master",
   "installed": null,
-  "installed_time": null,
   "outdated": false,
   "sha256": "92a1a815414fb940535a654e6ed8507c01ad0f31ea652246c1348f3b5b19f6f2",
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diff --git a/Casks/emacs-app-pretest/meta.json b/Casks/emacs-app-pretest/meta.json
index 8384c8b8..deed41f6 100644
--- a/Casks/emacs-app-pretest/meta.json
+++ b/Casks/emacs-app-pretest/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "29.1.90-pretest",
   "installed": null,
-  "installed_time": null,
   "outdated": false,
   "sha256": "b0594a29f375e63059344ee7c19641f594921f792e6b1df78d7413042d420f66",
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diff --git a/Casks/emacs-app/meta.json b/Casks/emacs-app/meta.json
index 3e076980..e73b46b6 100644
--- a/Casks/emacs-app/meta.json
+++ b/Casks/emacs-app/meta.json
@@ -13,7 +13,6 @@
   "appcast": null,
   "version": "29.1",
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-  "installed_time": null,
   "outdated": false,
   "sha256": "06975a567a038f557f88d865f438aa838a4da3a1771885b747bcd416cb85c67c",
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