diff --git a/src/config/index.ts b/src/config/index.ts
index 225efc6a..fb081f2b 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -1,17 +1,20 @@
 import Store from 'electron-store';
 
+import { deepmerge as createDeepmerge } from '@fastify/deepmerge';
+
 import defaultConfig from './defaults';
 import plugins from './plugins';
 import store from './store';
 
 import { restart } from '../providers/app-controls';
 
+const deepmerge = createDeepmerge();
 
 const set = (key: string, value: unknown) => {
   store.set(key, value);
 };
-const setPartial = (value: object) => {
-  // deepmerge(store.get, value);
+const setPartial = (key: string, value: object) => {
+  deepmerge(store.get(key), value);
   store.set(value);
 };
 
diff --git a/src/index.ts b/src/index.ts
index e27ed203..ff99b5cf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -101,11 +101,7 @@ ipcMain.handle('get-main-plugin-names', () => Object.keys(mainPlugins));
 
 const initHook = (win: BrowserWindow) => {
   ipcMain.handle('get-config', (_, id: keyof PluginBuilderList) => config.get(`plugins.${id}` as never) ?? pluginBuilders[id].config);
-  ipcMain.handle('set-config', (_, name: string, obj: object) => config.setPartial({
-    plugins: {
-      [name]: obj,
-    }
-  }));
+  ipcMain.handle('set-config', (_, name: string, obj: object) => config.setPartial(`plugins.${name}`, obj));
 
   config.watch((newValue) => {
     const value = newValue as Record<string, unknown>;
@@ -144,30 +140,18 @@ async function loadPlugins(win: BrowserWindow) {
     }
   });
 
-  
+
   const createContext = <
     Key extends keyof PluginBuilderList,
     Config extends PluginBaseConfig = PluginBuilderList[Key]['config'],
   >(name: Key): MainPluginContext<Config> => ({
-    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-    // @ts-expect-error
     getConfig: () => config.get(`plugins.${name}`) as unknown as Config,
     setConfig: (newConfig) => {
-      config.setPartial({
-        plugins: {
-          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-          [name]: {
-            // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-            // @ts-expect-error
-            ...config.get(`plugins.${name}`),
-            ...newConfig,
-          },
-        },
-      });
+      config.setPartial(`plugins.${name}`, newConfig);
 
       return Promise.resolve();
     },
-  
+
     send: (event: string, ...args: unknown[]) => {
       win.webContents.send(event, ...args);
     },
@@ -175,7 +159,7 @@ async function loadPlugins(win: BrowserWindow) {
       ipcMain.handle(event, async (_, ...args) => listener(...args as never));
     },
   });
- 
+
 
   for (const [pluginId, options] of config.plugins.getEnabled()) {
     const builder = pluginBuilders[pluginId as keyof PluginBuilderList];
diff --git a/src/menu.ts b/src/menu.ts
index 9d210f3d..d8199246 100644
--- a/src/menu.ts
+++ b/src/menu.ts
@@ -13,7 +13,7 @@ import { pluginBuilders } from 'virtual:PluginBuilders';
 /* eslint-enable import/order */
 
 import { getAvailablePluginNames } from './plugins/utils/main';
-import { MenuPluginContext, MenuPluginFactory, PluginBaseConfig, PluginContext } from './plugins/utils/builder';
+import { MenuPluginContext, MenuPluginFactory, PluginBaseConfig } from './plugins/utils/builder';
 
 export type MenuTemplate = Electron.MenuItemConstructorOptions[];
 
@@ -48,22 +48,13 @@ export const refreshMenu = (win: BrowserWindow) => {
 
 export const mainMenuTemplate = async (win: BrowserWindow): Promise<MenuTemplate> => {
   const innerRefreshMenu = () => refreshMenu(win);
-  const createContext = <Config extends PluginBaseConfig>(name: string): MenuPluginContext<Config> => ({
-    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-    // @ts-expect-error
+  const createContext = <
+    Key extends keyof PluginBuilderList,
+    Config extends PluginBaseConfig = PluginBuilderList[Key]['config'],
+  >(name: Key): MenuPluginContext<Config> => ({
     getConfig: () => config.get(`plugins.${name}`) as unknown as Config,
     setConfig: (newConfig) => {
-      config.setPartial({
-        plugins: {
-          // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-          [name]: {
-            // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-            // @ts-expect-error
-            ...config.get(`plugins.${name}`),
-            ...newConfig,
-          },
-        },
-      });
+      config.setPartial(`plugins.${name}`, newConfig);
 
       return Promise.resolve();
     },
@@ -83,7 +74,7 @@ export const mainMenuTemplate = async (win: BrowserWindow): Promise<MenuTemplate
       }
 
       const factory = menuList[id] as MenuPluginFactory<PluginBaseConfig>;
-      const template = await factory(createContext(id));
+      const template = await factory(createContext(id as never));
 
       return {
         label: pluginLabel,
diff --git a/src/plugins/utils/builder.ts b/src/plugins/utils/builder.ts
index c4d8ec6a..9416fe64 100644
--- a/src/plugins/utils/builder.ts
+++ b/src/plugins/utils/builder.ts
@@ -23,8 +23,8 @@ type IF<T> = (args: T) => T;
 type Promisable<T> = T | Promise<T>;
 
 export type PluginContext<Config extends PluginBaseConfig = PluginBaseConfig> = {
-  getConfig: () => Promise<Config>;
-  setConfig: (config: DeepPartial<Config>) => Promise<void>;
+  getConfig: () => Promisable<Config>;
+  setConfig: (config: DeepPartial<Config>) => Promisable<void>;
 };
 
 export type MainPluginContext<Config extends PluginBaseConfig = PluginBaseConfig> = PluginContext<Config> & {
diff --git a/src/renderer.ts b/src/renderer.ts
index d8aed8ad..dcb326a0 100644
--- a/src/renderer.ts
+++ b/src/renderer.ts
@@ -144,10 +144,11 @@ const createContext = <
 
   const rendererPluginResult = await Promise.allSettled(
     enabledPluginNameAndOptions.map(async ([id]) => {
+      // HACK: eslint has a bug detects the type of rendererPlugins as "any"
       const builder = (rendererPlugins as Record<string, RendererPluginFactory<PluginBaseConfig>>)[id];
 
-      const context = createContext(id as never);
-      return [id, await builder(context as never)] as const;
+      const context = createContext(id as keyof PluginBuilderList);
+      return [id, await builder(context)] as const;
     }),
   );
 
@@ -172,12 +173,12 @@ const createContext = <
       console.trace(error);
     }
   });
-  
-  window.ipcRenderer.on('config-changed', (_event, id: string, newConfig) => {
+
+  window.ipcRenderer.on('config-changed', (_event, id: string, newConfig: PluginBaseConfig) => {
     const plugin = rendererPluginList.find(([pluginId]) => pluginId === id);
 
     if (plugin) {
-      plugin[1].onConfigChange?.(newConfig as never);
+      plugin[1].onConfigChange?.(newConfig);
     }
   });