diff --git a/src/main/events/themes/css-injector.ts b/src/main/events/themes/css-injector.ts
index 0379c053..facee221 100644
--- a/src/main/events/themes/css-injector.ts
+++ b/src/main/events/themes/css-injector.ts
@@ -6,7 +6,6 @@ const injectCSS = async (
   cssString: string
 ) => {
   WindowManager.mainWindow?.webContents.send("css-injected", cssString);
-  return;
 };
 
 registerEvent("injectCSS", injectCSS);
diff --git a/src/main/services/window-manager.ts b/src/main/services/window-manager.ts
index 0fb33f15..9836a80a 100644
--- a/src/main/services/window-manager.ts
+++ b/src/main/services/window-manager.ts
@@ -23,7 +23,7 @@ import { AuthPage } from "@shared";
 export class WindowManager {
   public static mainWindow: Electron.BrowserWindow | null = null;
 
-  private static editorWindows: Map<string, BrowserWindow> = new Map();
+  private static readonly editorWindows: Map<string, BrowserWindow> = new Map();
 
   private static loadMainWindowURL(hash = "") {
     // HMR for renderer base on electron-vite cli.
diff --git a/src/renderer/src/helpers.ts b/src/renderer/src/helpers.ts
index 43531a0c..fab2a5c2 100644
--- a/src/renderer/src/helpers.ts
+++ b/src/renderer/src/helpers.ts
@@ -62,8 +62,8 @@ export const injectCustomCss = (css: string) => {
     }
 
     const style = document.createElement("style");
+    
     style.id = "custom-css";
-    style.type = "text/css";
     style.textContent = `
       ${css}
     `;
diff --git a/src/renderer/src/pages/settings/aparence/components/theme-actions.tsx b/src/renderer/src/pages/settings/aparence/components/theme-actions.tsx
index 4f85e384..8a3d3a6b 100644
--- a/src/renderer/src/pages/settings/aparence/components/theme-actions.tsx
+++ b/src/renderer/src/pages/settings/aparence/components/theme-actions.tsx
@@ -1,5 +1,4 @@
-import { GlobeIcon, TrashIcon } from "@primer/octicons-react";
-import { PlusIcon } from "@primer/octicons-react";
+import { GlobeIcon, TrashIcon, PlusIcon } from "@primer/octicons-react";
 import { Button } from "@renderer/components/button/button";
 import { useTranslation } from "react-i18next";
 import { AddThemeModal, DeleteAllThemesModal } from "../index";
diff --git a/src/renderer/src/pages/settings/aparence/themes-manager.ts b/src/renderer/src/pages/settings/aparence/themes-manager.ts
deleted file mode 100644
index 0f2b82e7..00000000
--- a/src/renderer/src/pages/settings/aparence/themes-manager.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-export interface Theme {
-  id: string;
-  name: string;
-  isActive: boolean;
-  description: string;
-  author: string | null;
-  authorId: string | null;
-  version: string;
-  code: string;
-  colors: {
-    accent: string;
-    surface: string;
-    background: string;
-    optional1?: string;
-    optional2?: string;
-  };
-}
-
-export class ThemesManager {}