diff --git a/package.json b/package.json
index 16fd7f8380..0efb6cfd03 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
         "cljs:electron-watch": "clojure -M:cljs watch app electron --config-merge '{:asset-path \"./js\"}'",
         "cljs:release": "clojure -M:cljs release app publishing electron",
         "cljs:release-electron": "clojure -M:cljs release app electron --debug && clojure -M:cljs release publishing",
-        "cljs:release-app": "clojure -M:cljs release app",
+        "cljs:release-app": "clojure -M:cljs release app --config-merge '{:compiler-options {:output-feature-set :es6}}'",
         "cljs:release-android-app": "clojure -M:cljs release app --config-merge '{:compiler-options {:output-feature-set :es6}}'",
         "cljs:test": "clojure -M:test compile test",
         "cljs:run-test": "node static/tests.js",
diff --git a/public/index.html b/public/index.html
index bcdaf496f6..e361001b68 100644
--- a/public/index.html
+++ b/public/index.html
@@ -46,7 +46,6 @@
 </script>
 <script defer src="/static/js/highlight.min.js"></script>
 <script defer src="/static/js/interact.min.js"></script>
-<script defer src="/static/js/lsplugin.core.js"></script>
 <script defer src="/static/js/main.js"></script>
 <script defer src="/static/js/code-editor.js"></script>
 <script defer src="/static/js/age-encryption.js"></script>
diff --git a/src/main/frontend/ui.cljs b/src/main/frontend/ui.cljs
index cd4813e4d3..1252052030 100644
--- a/src/main/frontend/ui.cljs
+++ b/src/main/frontend/ui.cljs
@@ -302,9 +302,13 @@
 (defn setup-system-theme-effect!
   []
   (let [^js schemaMedia (js/window.matchMedia "(prefers-color-scheme: dark)")]
-    (.addEventListener schemaMedia "change" state/sync-system-theme!)
+    (try (.addEventListener schemaMedia "change" state/sync-system-theme!)
+         (catch js/Error _error
+           (.addListener schemaMedia state/sync-system-theme!)))
     (state/sync-system-theme!)
-    #(.removeEventListener schemaMedia "change" state/sync-system-theme!)))
+    #(try (.removeEventListener schemaMedia "change" state/sync-system-theme!)
+          (catch js/Error _error
+            (.removeListener schemaMedia state/sync-system-theme!)))))
 
 (defn set-global-active-keystroke [val]
   (.setAttribute js/document.body "data-active-keystroke" val))