diff --git a/script.user.js b/script.user.js
index 1dc2871..7a1e519 100644
--- a/script.user.js
+++ b/script.user.js
@@ -50,6 +50,33 @@ background: #013e6d !important;
 .pale, i.pale, .directory_listing_table {
 color: white !important;
 opacity: 1;
+}
+/* Ace editor */
+.ace-tm .ace_gutter {
+
 }
 `;
-document.body.appendChild(style);
\ No newline at end of file
+function waitForElm(selector) {
+    return new Promise(resolve => {
+        if (document.querySelector(selector)) {
+            return resolve(document.querySelector(selector));
+        }
+
+        const observer = new MutationObserver(mutations => {
+            if (document.querySelector(selector)) {
+                observer.disconnect();
+                resolve(document.querySelector(selector));
+            }
+        });
+
+        // If you get "parameter 1 is not of type 'Node'" error, see https://stackoverflow.com/a/77855838/492336
+        observer.observe(document.body, {
+            childList: true,
+            subtree: true
+        });
+    });
+}
+document.body.appendChild(style);
+waitForElm('.ace_gutter').then((elm) => {
+    Anywhere.Editor.editor.setOption("theme", "ace/theme/tomorrow_night")
+});