diff --git a/frontend/env.d.ts b/frontend/env.d.ts
index 7440602da..4720b5504 100644
--- a/frontend/env.d.ts
+++ b/frontend/env.d.ts
@@ -3,16 +3,6 @@
 /// <reference types="cypress" />
 /// <reference types="@histoire/plugin-vue/components" />
 
-declare module 'postcss-focus-within/browser' {
-	import focusWithinInit from 'postcss-focus-within/browser'
-	export default focusWithinInit
-}
-
-declare module 'css-has-pseudo/browser' {
-	import cssHasPseudo from 'css-has-pseudo/browser'
-	export default cssHasPseudo
-}
-
 interface ImportMetaEnv {
 	readonly VIKUNJA_API_URL?: string
 	readonly VIKUNJA_HTTP_PORT?: number
diff --git a/frontend/package.json b/frontend/package.json
index 2ca64cbc3..e35b10c5f 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -155,7 +155,6 @@
     "autoprefixer": "10.4.19",
     "browserslist": "4.23.0",
     "caniuse-lite": "1.0.30001617",
-    "css-has-pseudo": "6.0.3",
     "csstype": "3.1.3",
     "cypress": "13.9.0",
     "esbuild": "0.21.1",
@@ -166,7 +165,6 @@
     "postcss": "8.4.38",
     "postcss-easing-gradients": "3.0.1",
     "postcss-easings": "4.0.0",
-    "postcss-focus-within": "8.0.1",
     "postcss-preset-env": "9.5.11",
     "rollup": "4.17.2",
     "rollup-plugin-visualizer": "5.12.0",
diff --git a/frontend/pnpm-lock.yaml b/frontend/pnpm-lock.yaml
index 018a85770..b2c8881ed 100644
--- a/frontend/pnpm-lock.yaml
+++ b/frontend/pnpm-lock.yaml
@@ -323,9 +323,6 @@ importers:
       caniuse-lite:
         specifier: 1.0.30001617
         version: 1.0.30001617
-      css-has-pseudo:
-        specifier: 6.0.3
-        version: 6.0.3(postcss@8.4.38)
       csstype:
         specifier: 3.1.3
         version: 3.1.3
@@ -356,9 +353,6 @@ importers:
       postcss-easings:
         specifier: 4.0.0
         version: 4.0.0(postcss@8.4.38)
-      postcss-focus-within:
-        specifier: 8.0.1
-        version: 8.0.1(postcss@8.4.38)
       postcss-preset-env:
         specifier: 9.5.11
         version: 9.5.11(postcss@8.4.38)
diff --git a/frontend/src/histoire.setup.ts b/frontend/src/histoire.setup.ts
index c19562ff6..495ccc985 100644
--- a/frontend/src/histoire.setup.ts
+++ b/frontend/src/histoire.setup.ts
@@ -1,4 +1,3 @@
-import './polyfills'
 import {defineSetupVue3} from '@histoire/plugin-vue'
 import {i18n} from './i18n'
 
diff --git a/frontend/src/main.ts b/frontend/src/main.ts
index 6afbc25ed..c5687097f 100644
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -1,4 +1,3 @@
-import './polyfills'
 import {createApp} from 'vue'
 
 import pinia from './pinia'
diff --git a/frontend/src/polyfills.ts b/frontend/src/polyfills.ts
deleted file mode 100644
index 3751a1318..000000000
--- a/frontend/src/polyfills.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-// in order to use postcss-preset-env correctly we need some client side plugins
-import focusWithinInit from 'postcss-focus-within/browser'
-import cssHasPseudo from 'css-has-pseudo/browser'
-
-focusWithinInit()
-cssHasPseudo(document)
\ No newline at end of file
diff --git a/frontend/tsconfig.config.json b/frontend/tsconfig.config.json
index eae5920b6..3a3f40d0d 100644
--- a/frontend/tsconfig.config.json
+++ b/frontend/tsconfig.config.json
@@ -3,7 +3,7 @@
     "@tsconfig/node18/tsconfig.json",
     "@vue/tsconfig/tsconfig.json"
   ],
-  "include": ["vite.config.*", "vitest.config.*", "cypress.config.*", "env.config.d.ts"],
+  "include": ["vite.config.*", "vitest.config.*", "cypress.config.*"],
   "compilerOptions": {
     "composite": true,
     "types": ["node"]
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 9f4cbca12..562247475 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -100,18 +100,7 @@ export default defineConfig(({mode}) => {
 				plugins: [
 					postcssEasings(),
 					postcssEasingGradients(),
-					postcssPresetEnv({
-						// Since postcss-preset-env v8.0.0 the 'enableClientSidePolyfills' option is disabled by default.
-						// This is the list of features that require a client side library:
-						// https://github.com/csstools/postcss-plugins/tree/main/plugin-packs/postcss-preset-env#plugins-that-need-client-library
-						// Since we only use 'focus-within-pseudo-class' we have to force enable
-						// that plugin now manually in order to keep the browser support as it was.
-						// See also './src/polyfills.ts'
-						features: {
-							'focus-within-pseudo-class': true,
-							'has-pseudo-class': true,
-						},
-					}),
+					postcssPresetEnv(),
 				],
 			},
 		},