diff --git a/customiser.py b/customiser.py
index a85dcad..cd91a1d 100755
--- a/customiser.py
+++ b/customiser.py
@@ -118,22 +118,22 @@ try:
                 f' ...linking to {os.path.join(".", "resources", "user.css")}')
             with open(os.path.join(__dirname__, 'resources', 'preload.js'), 'r', encoding='UTF-8') as insert:
                 append.write(insert.read().replace(
-                    '☃☃☃assets☃☃☃', os.path.join(enhancer_folder, 'resources').replace('\\', '/'))
+                    '☃☃☃assets☃☃☃', os.path.join(enhancer_folder, 'resources').replace('\\', '/')))
     else:
         print(
             f' * {os.path.join(filepath, "app","renderer","preload.js")} was not found: step skipped.')
 
     if os.path.isfile(os.path.join(filepath, "app", "main", "createWindow.js")):
         with open(os.path.join(filepath, "app", "main", "createWindow.js"), 'r', encoding='UTF-8') as content:
-            content=content.read()
+            content = content.read()
             print(
                 f' ...making window frameless @ {os.path.join(filepath, "app", "main", "createWindow.js")}')
             if '{ frame: false, show: false' not in content:
-                content=content.replace(
+                content = content.replace(
                     '{ show: false', '{ frame: false, show: false')
             print(
                 f' ...adding "open hidden" capabilities to {os.path.join(filepath, "app", "main", "createWindow.js")}')
-            content=re.sub('\\s*\\/\\* === INJECTION START === \\*\\/.*?\\/\\* === INJECTION END === \\*\\/\\s*',
+            content = re.sub('\\s*\\/\\* === INJECTION START === \\*\\/.*?\\/\\* === INJECTION END === \\*\\/\\s*',
                              'window.show()', content, flags=re.DOTALL).replace('window.show()', """
                 /* === INJECTION START === */
                 const path = require('path'),
@@ -158,10 +158,10 @@ try:
         with open(os.path.join(filepath, "app", "renderer", "index.js"), 'r', encoding='UTF-8') as content:
             print(
                 f' ...adjusting drag area for frameless window in {os.path.join(filepath, "app", "renderer", "index.js")}')
-            content=content.read()
-            loc=content.rfind('dragRegionStyle')
-            content=content[:loc] + content[loc:]
-                .replace('top: 0', 'top: 1', 1)
+            content = content.read()
+            loc = content.rfind('dragRegionStyle')
+            content = content[:loc] + content[loc:] \
+                .replace('top: 0', 'top: 1', 1) \
                 .replace('height: 34', 'height: 10', 1)
             with open(os.path.join(filepath, "app", "renderer", "index.js"), 'w', encoding='UTF-8') as write:
                 write.write(content)
@@ -175,11 +175,11 @@ try:
                 f' ...adding tray support (inc. context menu with settings) to {os.path.join(filepath, "app", "main", "main.js")}')
             print(
                 f' ...adding window toggle hotkey to {os.path.join(filepath, "app", "main", "main.js")}')
-            content=content.read()
+            content = content.read()
             with open(os.path.join(filepath, "app", "main", "main.js"), 'w', encoding='UTF-8') as write:
                 if '/* === INJECTION MARKER === */' in content:
                     print(' * tray.js already added. replacing it.')
-                    original=[]
+                    original = []
                     for line in content.splitlines():
                         if '/* === INJECTION MARKER === */' in line:
                             break
diff --git a/resources/preload.js b/resources/preload.js
index 2ccf629..dee1712 100644
--- a/resources/preload.js
+++ b/resources/preload.js
@@ -61,7 +61,9 @@ require('electron').remote.getGlobal('setTimeout')(() => {
       .appendChild(buttons);
     document
       .querySelector('.notion-history-back-button')
-      .parentElement.nextSibling.classList.add('notion-topbar-breadcrumb');
+      .parentElement.nextElementSibling.classList.add(
+        'notion-topbar-breadcrumb'
+      );
     document
       .querySelector('.notion-topbar-share-menu')
       .parentElement.classList.add('notion-topbar-actions');