diff --git a/.eleventy.js b/.eleventy.js
index de27046c..d46ceaf3 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -11,6 +11,7 @@ const markdownItFootnote = require('markdown-it-footnote')
 const filters = require('./config/filters.js')
 const dateFilters = require('./config/dateFilters.js')
 const mediaFilters = require('./config/mediaFilters.js')
+const CleanCSS = require('clean-css')
 const now = String(Date.now())
 
 // load .env
@@ -52,6 +53,9 @@ module.exports = function (eleventyConfig) {
     eleventyConfig.addLiquidFilter(filterName, mediaFilters[filterName])
   })
 
+  // css filters
+  eleventyConfig.addFilter('cssmin', (code) => new CleanCSS({}).minify(code).styles)
+
   // enable merging of tags
   eleventyConfig.setDataDeepMerge(true)
 
diff --git a/package.json b/package.json
index f1300bbd..99235434 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "@typescript-eslint/eslint-plugin": "^5.59.7",
     "@typescript-eslint/parser": "^5.59.7",
     "autoprefixer": "^10.4.2",
+    "clean-css": "^5.3.2",
     "dotenv-flow": "^3.2.0",
     "eleventy-plugin-unfurl": "^1.0.0",
     "eslint-plugin-jsx-a11y": "^6.7.1",
diff --git a/src/_includes/base.liquid b/src/_includes/base.liquid
index 0f2ace9f..1db60dc4 100644
--- a/src/_includes/base.liquid
+++ b/src/_includes/base.liquid
@@ -29,8 +29,13 @@
       href="/assets/img/favicon/favicon-32x32.png">
     <link rel="apple-touch-icon" href="/assets/img/favicon/apple-touch-icon.png">
     <link href="/assets/styles/tailwind.css?v={% version %}" rel="stylesheet" />
-    <link href="/assets/styles/prism.css?v={% version %}" rel="stylesheet" />
-    <link href="/assets/styles/index.css?v={% version %}" rel="stylesheet" />
+    {% capture css %}
+      {% include "../assets/styles/prism.css" %}
+      {% include "../assets/styles/index.css" %}
+    {% endcapture %}
+    <style>
+      {{ css | cssmin }}
+    </style>
     {% if env != 'development' %}
       <script>
         window.va = window.va || function() {
diff --git a/yarn.lock b/yarn.lock
index bf3d3221..c5043425 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1337,6 +1337,13 @@ clean-css@^4.2.1:
   dependencies:
     source-map "~0.6.0"
 
+clean-css@^5.3.2:
+  version "5.3.2"
+  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-5.3.2.tgz#70ecc7d4d4114921f5d298349ff86a31a9975224"
+  integrity sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==
+  dependencies:
+    source-map "~0.6.0"
+
 clean-stack@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/clean-stack/-/clean-stack-2.2.0.tgz#ee8472dbb129e727b31e8a10a427dee9dfe4008b"