diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9c0390..562284d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+- 2.4.4:
+
+  - Adjust script loading to work with new restrictions in Thunderbird 153.2.
+
 - 2.4.3:
 
   - Increase maximum listed version of Thunderbird for tbkeys-lite to 149
diff --git a/addon/implementation.js b/addon/implementation.js
index c3d8ed4..aa7c65a 100644
--- a/addon/implementation.js
+++ b/addon/implementation.js
@@ -165,9 +165,9 @@ var TBKeys = {
   },
 
   loadWindowChrome: function (win) {
-    Services.scriptloader.loadSubScript(
+    Services.scriptloader.loadSubScriptWithOptions(
       extension.rootURI.resolve("modules/mousetrap.js"),
-      win
+      { target: win, allowUnsafeURL: true }
     );
     win.Mousetrap.prototype.stopCallback = stopCallback;
     let type = win.document.documentElement.getAttribute("windowtype");