diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa07bc7b..a7fe6e82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - (**Migration**) Add "in library" indicator
 - (**Settings/WebView**) Add setting to enable/disable WebView
 - (**Settings/Sync**) Add sync settings
+- (**Extension**) Support installing external JARs
 
 ### Changed
 
diff --git a/src/features/browse/extensions/Extensions.tsx b/src/features/browse/extensions/Extensions.tsx
index 4668e23a..4b675423 100644
--- a/src/features/browse/extensions/Extensions.tsx
+++ b/src/features/browse/extensions/Extensions.tsx
@@ -172,7 +172,7 @@ export function Extensions({ tabsMenuHeight }: { tabsMenuHeight: number }) {
     const handleExtensionUpdate = useCallback(() => setRefetchExtensions({}), []);
 
     const submitExternalExtension = (file: File) => {
-        if (!file.name.toLowerCase().endsWith('apk')) {
+        if (!file.name.toLowerCase().match(/\.(apk|jar)$/g)) {
             makeToast(t`Invalid filetype`, 'error');
             return;
         }
diff --git a/versionToServerVersionMapping.json b/versionToServerVersionMapping.json
index ddaec870..cc02f274 100644
--- a/versionToServerVersionMapping.json
+++ b/versionToServerVersionMapping.json
@@ -1,7 +1,7 @@
 [
     {
         "uiVersion": "PREVIEW",
-        "serverVersion": "r2230"
+        "serverVersion": "r2243"
     },
     {
         "tag": "v20260509.01",