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diff --git a/packages/browser-renderer/src/__tests__/fontSync.test.ts b/packages/browser-renderer/src/__tests__/fontSync.test.ts
new file mode 100644
index 0000000..c42a247
--- /dev/null
+++ b/packages/browser-renderer/src/__tests__/fontSync.test.ts
@@ -0,0 +1,82 @@
+/** @jest-environment node */
+
+import puppeteer from 'puppeteer';
+import { PORT } from 'config/jest/testServer';
+
+import type { Browser, Page } from 'puppeteer';
+
+const setup = async (browser: Browser): Promise<Page> => {
+  const page = await browser.newPage();
+  await page.setViewport({ width: 300, height: 200, deviceScaleFactor: 2 });
+  await page.goto(`http://localhost:${PORT}`);
+  await page.waitForSelector('input');
+  return page;
+};
+
+const run = async (page: Page, cmd: string) => {
+  await page.keyboard.type(`:${cmd}`);
+  await page.keyboard.press('Enter');
+};
+
+describe('Font sync between VVset fontfamily and &guifont', () => {
+  jest.setTimeout(30000);
+
+  let browser: Browser;
+  let page: Page;
+
+  beforeAll(async () => {
+    browser = await puppeteer.launch({
+      headless: true,
+      slowMo: 10,
+      args: ['--no-sandbox', '--disable-setuid-sandbox'],
+    });
+  });
+
+  afterAll(async () => {
+    // await browser.close();
+  });
+
+  beforeEach(async () => {
+    page = await setup(browser);
+  });
+
+  afterEach(async () => {
+    await page.close();
+  });
+
+  test('VVset fontfamily renders with the requested font', async () => {
+    await run(page, 'VVset fontfamily=Monaco');
+    await run(page, 'VVset fontsize=14');
+    await page.keyboard.type('iHello Monaco');
+    await page.keyboard.press('Escape');
+    const image = await page.screenshot();
+    expect(image).toMatchImageSnapshot();
+  });
+
+  test('set guifont=<family> syncs to VV fontfamily', async () => {
+    await run(page, 'set guifont=Menlo');
+    await run(page, 'VVset fontsize=14');
+    await page.keyboard.type('iguifont Menlo');
+    await page.keyboard.press('Escape');
+    const image = await page.screenshot();
+    expect(image).toMatchImageSnapshot();
+  });
+
+  test('set guifont=<family>:h<size> syncs both family and size', async () => {
+    await run(page, 'set guifont=Courier\\ New:h16');
+    await page.keyboard.type('iCourier h16');
+    await page.keyboard.press('Escape');
+    const image = await page.screenshot();
+    expect(image).toMatchImageSnapshot();
+  });
+
+  test('VVset fontfamily updates &guifont (reverse sync)', async () => {
+    await run(page, 'VVset fontfamily=Monaco');
+    await run(page, 'VVset fontsize=15');
+    // `:set guifont?` echoes the value to the command line, which the
+    // screenshot captures.
+    await run(page, 'set guifont?');
+    const image = await page.screenshot();
+    expect(image).toMatchImageSnapshot();
+  });
+});
diff --git a/packages/browser-renderer/src/screen.ts b/packages/browser-renderer/src/screen.ts
index 1146aa4..805b9a8 100644
--- a/packages/browser-renderer/src/screen.ts
+++ b/packages/browser-renderer/src/screen.ts
@@ -443,18 +443,6 @@ const screen = ({
     cursorEl.style.transform = `translate(${left}px, ${top}px)`;
   };
 
-  const optionSet = {
-    guifont: (newFont: string) => {
-      const [newFontFamily, newFontSize] = newFont.trim().split(':h');
-      if (newFontFamily && newFontFamily !== '') {
-        nvim.command(`VVset fontfamily=${newFontFamily.replace(/_/g, '\\ ')}`);
-        if (newFontSize && newFontFamily !== '') {
-          nvim.command(`VVset fontsize=${newFontSize}`);
-        }
-      }
-    },
-  };
-
   const recalculateHighlightTable = () => {
     (Object.keys(highlightTable) as unknown as number[]).forEach((id) => {
       if (id > 0) {
@@ -573,16 +561,8 @@ const screen = ({
       modeInfoSet = props[0][1].reduce((r, modeInfo) => ({ ...r, [modeInfo.name]: modeInfo }), {});
     },
 
-    option_set: (options) => {
-      options.forEach(([option, value]) => {
-        // @ts-expect-error TODO
-        if (optionSet[option]) {
-          // @ts-expect-error TODO
-          optionSet[option](value);
-        } else {
-          // console.warn('Unknown option', option, value); // eslint-disable-line no-console
-        }
-      });
+    option_set: () => {
+      /* empty */
     },
 
     mode_change: (modes) => {
diff --git a/packages/electron/bin/vvset.vim b/packages/electron/bin/vvset.vim
index b3381c9..4a18694 100644
--- a/packages/electron/bin/vvset.vim
+++ b/packages/electron/bin/vvset.vim
@@ -32,6 +32,52 @@ let g:vv_default_settings = {
 
 let g:vv_settings = deepcopy(g:vv_default_settings)
 
+" Guard against infinite recursion when syncing fontfamily/fontsize and &guifont.
+let g:vv_syncing_font = 0
+
+" Apply VV's current fontfamily + fontsize to nvim's &guifont.
+" Builds "<family-1>:h<size>,<family-2>,..." so :set guifont? matches VV.
+function! s:SyncGuifont()
+  if g:vv_syncing_font | return | endif
+  let l:parts = split(get(g:vv_settings, 'fontfamily', ''), ',')
+  if empty(l:parts) | return | endif
+  let l:size = get(g:vv_settings, 'fontsize', '')
+  let l:first = escape(l:parts[0], ' \')
+  if l:size !=# '' && l:size != 0
+    let l:first .= ':h' . l:size
+  endif
+  let l:rest = map(l:parts[1:], 'escape(v:val, " \\")')
+  let l:guifont = empty(l:rest) ? l:first : l:first . ',' . join(l:rest, ',')
+  let g:vv_syncing_font = 1
+  try
+    execute 'set guifont=' . l:guifont
+  catch
+  endtry
+  let g:vv_syncing_font = 0
+endfunction
+
+" Parse &guifont and apply its first entry's family + :h<size> to VV.
+function! s:SyncFromGuifont(value)
+  if g:vv_syncing_font || a:value ==# '' | return | endif
+  let l:first = split(a:value, ',')[0]
+  let l:family = substitute(l:first, ':h.*$', '', '')
+  if l:family ==# '' | return | endif
+  let l:size = matchstr(l:first, ':h\zs[0-9.]\+')
+  let g:vv_syncing_font = 1
+  call VVsetItem('fontfamily=' . l:family)
+  if l:size !=# ''
+    call VVsetItem('fontsize=' . l:size)
+  endif
+  let g:vv_syncing_font = 0
+endfunction
+
+augroup VVFontSync
+  autocmd!
+  autocmd OptionSet guifont call s:SyncFromGuifont(v:option_new)
+  " Catch &guifont set in init.vim — OptionSet does not fire during startup.
+  autocmd VimEnter * call s:SyncFromGuifont(&guifont)
+augroup END
+
 " Custom VVset command, mimic default set command (:help set) with
 " settings specified in g:vv_default_settings
 function! VVset(...)
@@ -124,6 +170,9 @@ function! VVsetItem(name)
   if has_key(g:vv_settings, l:name)
     let g:vv_settings[l:name] = l:value
     call rpcnotify(get(g:, "vv_channel", 1), "vv:set", l:name, l:value)
+    if l:name ==# 'fontfamily' || l:name ==# 'fontsize'
+      call s:SyncGuifont()
+    endif
   else
     echoerr "Unknown option: ".l:name
   endif
diff --git a/packages/electron/package.json b/packages/electron/package.json
index 1df0c96..dfb6ff9 100644
--- a/packages/electron/package.json
+++ b/packages/electron/package.json
@@ -2,7 +2,7 @@
   "name": "@vvim/electron",
   "description": "Neovim GUI Client",
   "author": "Igor Gladkoborodov <igor.gladkoborodov@gmail.com>",
-  "version": "2.6.2",
+  "version": "2.6.3",
   "private": true,
   "keywords": [
     "vim",
diff --git a/packages/server/bin/vvset.vim b/packages/server/bin/vvset.vim
index b3381c9..4a18694 100644
--- a/packages/server/bin/vvset.vim
+++ b/packages/server/bin/vvset.vim
@@ -32,6 +32,52 @@ let g:vv_default_settings = {
 
 let g:vv_settings = deepcopy(g:vv_default_settings)
 
+" Guard against infinite recursion when syncing fontfamily/fontsize and &guifont.
+let g:vv_syncing_font = 0
+
+" Apply VV's current fontfamily + fontsize to nvim's &guifont.
+" Builds "<family-1>:h<size>,<family-2>,..." so :set guifont? matches VV.
+function! s:SyncGuifont()
+  if g:vv_syncing_font | return | endif
+  let l:parts = split(get(g:vv_settings, 'fontfamily', ''), ',')
+  if empty(l:parts) | return | endif
+  let l:size = get(g:vv_settings, 'fontsize', '')
+  let l:first = escape(l:parts[0], ' \')
+  if l:size !=# '' && l:size != 0
+    let l:first .= ':h' . l:size
+  endif
+  let l:rest = map(l:parts[1:], 'escape(v:val, " \\")')
+  let l:guifont = empty(l:rest) ? l:first : l:first . ',' . join(l:rest, ',')
+  let g:vv_syncing_font = 1
+  try
+    execute 'set guifont=' . l:guifont
+  catch
+  endtry
+  let g:vv_syncing_font = 0
+endfunction
+
+" Parse &guifont and apply its first entry's family + :h<size> to VV.
+function! s:SyncFromGuifont(value)
+  if g:vv_syncing_font || a:value ==# '' | return | endif
+  let l:first = split(a:value, ',')[0]
+  let l:family = substitute(l:first, ':h.*$', '', '')
+  if l:family ==# '' | return | endif
+  let l:size = matchstr(l:first, ':h\zs[0-9.]\+')
+  let g:vv_syncing_font = 1
+  call VVsetItem('fontfamily=' . l:family)
+  if l:size !=# ''
+    call VVsetItem('fontsize=' . l:size)
+  endif
+  let g:vv_syncing_font = 0
+endfunction
+
+augroup VVFontSync
+  autocmd!
+  autocmd OptionSet guifont call s:SyncFromGuifont(v:option_new)
+  " Catch &guifont set in init.vim — OptionSet does not fire during startup.
+  autocmd VimEnter * call s:SyncFromGuifont(&guifont)
+augroup END
+
 " Custom VVset command, mimic default set command (:help set) with
 " settings specified in g:vv_default_settings
 function! VVset(...)
@@ -124,6 +170,9 @@ function! VVsetItem(name)
   if has_key(g:vv_settings, l:name)
     let g:vv_settings[l:name] = l:value
     call rpcnotify(get(g:, "vv_channel", 1), "vv:set", l:name, l:value)
+    if l:name ==# 'fontfamily' || l:name ==# 'fontsize'
+      call s:SyncGuifont()
+    endif
   else
     echoerr "Unknown option: ".l:name
   endif