diff --git a/packages/skrt/package.json b/packages/skrt/package.json
index 29a9b44..d771c28 100644
--- a/packages/skrt/package.json
+++ b/packages/skrt/package.json
@@ -39,7 +39,7 @@
   },
   "devDependencies": {
     "@tailwindcss/typography": "^0.4.1",
-    "csso-cli": "^3.0.0",
+    "csso-cli": "^4.0.2",
     "npm-run-all": "^4.1.5",
     "postcss": "^8.3.5",
     "postcss-cli": "^8.3.1",
diff --git a/packages/styles/package.json b/packages/styles/package.json
index ebbd2e7..9d48eec 100644
--- a/packages/styles/package.json
+++ b/packages/styles/package.json
@@ -47,7 +47,7 @@
   "devDependencies": {
     "@generates/skrt": "^0.0.7",
     "@tailwindcss/typography": "^0.4.1",
-    "csso-cli": "^3.0.0",
+    "csso-cli": "^4.0.2",
     "npm-run-all": "^4.1.5",
     "postcss-cli": "^8.3.1",
     "tailwindcss": "^2.2.4"
diff --git a/yarn.lock b/yarn.lock
index 80fc3f8..b489a92 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2469,7 +2469,7 @@ chardet@^0.7.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
   integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
 
-chokidar@^3.0.0, chokidar@^3.3.0, chokidar@^3.5.1:
+chokidar@^3.3.0, chokidar@^3.5.1:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.5.1.tgz#ee9ce7bbebd2b79f49f304799d5468e31e14e68a"
   integrity sha512-9+s+Od+W0VJJzawDma/gvBNQqkTiqYTWLuZoyAsivsI4AaWTCzHG06/TMjsf1cYe9Cb97UCEhjz7HvnPk2p/tw==
@@ -2499,17 +2499,32 @@ chokidar@^3.5.2:
   optionalDependencies:
     fsevents "~2.3.2"
 
+chokidar@^3.5.3:
+  version "3.5.3"
+  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.5.3.tgz#1cf37c8707b932bd1af1ae22c0432e2acd1903bd"
+  integrity sha512-Dr3sfKRP6oTcjf2JmUmFJfeVMvXBdegxB0iVQ5eb2V10uFJUCAS8OByZdVAyVb8xXNz3GjjTgj9kLWsZTqE6kw==
+  dependencies:
+    anymatch "~3.1.2"
+    braces "~3.0.2"
+    glob-parent "~5.1.2"
+    is-binary-path "~2.1.0"
+    is-glob "~4.0.1"
+    normalize-path "~3.0.0"
+    readdirp "~3.6.0"
+  optionalDependencies:
+    fsevents "~2.3.2"
+
 ci-info@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-2.0.0.tgz#67a9e964be31a51e15e5010d58e6f12834002f46"
   integrity sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ==
 
-clap@^1.0.9:
-  version "1.2.3"
-  resolved "https://registry.yarnpkg.com/clap/-/clap-1.2.3.tgz#4f36745b32008492557f46412d66d50cb99bce51"
-  integrity sha512-4CoL/A3hf90V3VIEjeuhSvlGFEHKzOz+Wfc2IVZc+FaUgU0ZQafJTP49fvnULipOPcAfqhyI2duwQyns6xqjYA==
+clap@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/clap/-/clap-3.1.1.tgz#c2d2688f89eb90a68e7b8a6619ed2303b43c2c04"
+  integrity sha512-vp42956Ax06WwaaheYEqEOgXZ3VKJxgccZ0gJL0HpyiupkIS9RVJFo5eDU1BPeQAOqz+cclndZg4DCqG1sJReQ==
   dependencies:
-    chalk "^1.1.3"
+    ansi-colors "^4.1.1"
 
 classnames@^2.3.1:
   version "2.3.1"
@@ -2757,13 +2772,13 @@ css-selector-parser@^1.4.1:
   resolved "https://registry.yarnpkg.com/css-selector-parser/-/css-selector-parser-1.4.1.tgz#03f9cb8a81c3e5ab2c51684557d5aaf6d2569759"
   integrity sha512-HYPSb7y/Z7BNDCOrakL4raGO2zltZkbeXyAd6Tg9obzix6QhzxCotdBl6VT0Dv4vZfJGVz3WL/xaEI9Ly3ul0g==
 
-css-tree@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.1.2.tgz#9ae393b5dafd7dae8a622475caec78d3d8fbd7b5"
-  integrity sha512-wCoWush5Aeo48GLhfHPbmvZs59Z+M7k5+B1xDnXbdWNcEF423DoFdqSWE0PM5aNk5nI5cp1q7ms36zGApY/sKQ==
+css-tree@~2.2.0:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-2.2.1.tgz#36115d382d60afd271e377f9c5f67d02bd48c032"
+  integrity sha512-OA0mILzGc1kCOCSJerOeqDxDQ4HOh+G8NbOJFOTgOCzpw7fCBubk0fEyxp8AgOL/jvLgYA/uV0cMbe43ElF1JA==
   dependencies:
-    mdn-data "2.0.14"
-    source-map "^0.6.1"
+    mdn-data "2.0.28"
+    source-map-js "^1.0.1"
 
 css-unit-converter@^1.1.1:
   version "1.1.2"
@@ -2775,22 +2790,22 @@ cssesc@^3.0.0:
   resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-3.0.0.tgz#37741919903b868565e1c09ea747445cd18983ee"
   integrity sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==
 
-csso-cli@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/csso-cli/-/csso-cli-3.0.0.tgz#a9bf3de54067c5ee471cbdb002da2b89ece9b06c"
-  integrity sha512-j0ytVZ8qHXcFnR3HOvfH8RWOeHtlqwt97mYe32AnJ2yG6noqV0Jsn8OwOQq8wpdavkHr8JOx6drRtY2HoKLjqw==
+csso-cli@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/csso-cli/-/csso-cli-4.0.2.tgz#4c056c4fddd9cb26583953dc74db46c8f64fb098"
+  integrity sha512-p/VipA45w8EmS8Lv6wGtE+UdsbFlqUBGhL9FCTGKxd5dC07mtg3BbZaMzMh0X+oIl2JUGR/mPx5YzuNnTM2a3w==
   dependencies:
-    chokidar "^3.0.0"
-    clap "^1.0.9"
-    csso "^4.0.1"
-    source-map "^0.6.1"
+    chokidar "^3.5.3"
+    clap "^3.1.1"
+    csso "^5.0.4"
+    source-map-js "^1.0.2"
 
-csso@^4.0.1:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/csso/-/csso-4.2.0.tgz#ea3a561346e8dc9f546d6febedd50187cf389529"
-  integrity sha512-wvlcdIbf6pwKEk7vHj8/Bkc0B4ylXZruLvOgs9doS5eOsOpuodOV2zJChSpkp+pRpYQLQMeF04nr3Z68Sta9jA==
+csso@^5.0.4:
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/csso/-/csso-5.0.5.tgz#f9b7fe6cc6ac0b7d90781bb16d5e9874303e2ca6"
+  integrity sha512-0LrrStPOdJj+SPCCrGhzryycLjwcgUSHBtxNA8aIDxf0GLsRh1cKYhB00Gd1lDOS4yGH69+SNn13+TWbVHETFQ==
   dependencies:
-    css-tree "^1.1.2"
+    css-tree "~2.2.0"
 
 cssom@^0.4.4:
   version "0.4.4"
@@ -4925,10 +4940,10 @@ mdast-util-toc@^5.1.0:
     unist-util-is "^4.0.0"
     unist-util-visit "^2.0.0"
 
-mdn-data@2.0.14:
-  version "2.0.14"
-  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.0.14.tgz#7113fc4281917d63ce29b43446f701e68c25ba50"
-  integrity sha512-dn6wd0uw5GsdswPFfsgMp5NSB0/aDe6fK94YJV/AJDYXL6HVLWBsxeq7js7Ad+mU2K9LAlwpk6kN2D5mwCPVow==
+mdn-data@2.0.28:
+  version "2.0.28"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.0.28.tgz#5ec48e7bef120654539069e1ae4ddc81ca490eba"
+  integrity sha512-aylIc7Z9y4yzHYAJNuESG3hfhC+0Ibp/MAMiaOZgNv4pmEdFyfZhhhny4MNiAfWdBQ1RQ2mfDWmM1x8SvGyp8g==
 
 mdurl@^1.0.0:
   version "1.0.1"
@@ -6352,6 +6367,11 @@ source-map-js@^0.6.2:
   resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-0.6.2.tgz#0bb5de631b41cfbda6cfba8bd05a80efdfd2385e"
   integrity sha512-/3GptzWzu0+0MBQFrDKzw/DvvMTUORvgY6k6jd/VS6iCR4RDTKWH6v6WPwQoUO8667uQEf9Oe38DxAYWY5F/Ug==
 
+source-map-js@^1.0.1, source-map-js@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.0.2.tgz#adbc361d9c62df380125e7f161f71c826f1e490c"
+  integrity sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==
+
 source-map@^0.5.0:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"