diff --git a/themes/terminal/package.json b/themes/terminal/package.json
index fc5670a..5b9a9f6 100644
--- a/themes/terminal/package.json
+++ b/themes/terminal/package.json
@@ -34,7 +34,7 @@
     "extract-text-webpack-plugin": "^4.0.0-beta.0",
     "file-loader": "^1.1.11",
     "html-webpack-plugin": "^3.2.0",
-    "postcss": "^7.0.0",
+    "postcss": "^8.2.10",
     "postcss-browser-reporter": "^0.5.0",
     "postcss-cli": "^6.1.1",
     "postcss-color-function": "^4.0.1",
diff --git a/themes/terminal/yarn.lock b/themes/terminal/yarn.lock
index ce3113f..4a155b4 100644
--- a/themes/terminal/yarn.lock
+++ b/themes/terminal/yarn.lock
@@ -1482,15 +1482,7 @@ chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.4.1:
-  version "2.4.1"
-  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.1.tgz#18c49ab16a037b6eb0152cc83e3471338215b66e"
-  dependencies:
-    ansi-styles "^3.2.1"
-    escape-string-regexp "^1.0.5"
-    supports-color "^5.3.0"
-
-chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -1689,6 +1681,11 @@ color@^3.0.0:
     color-convert "^1.9.1"
     color-string "^1.5.2"
 
+colorette@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
+  integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
+
 colors@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.1.2.tgz#168a4701756b6a7f51a12ce0c97bfa28c084ed63"
@@ -3955,6 +3952,11 @@ nan@^2.9.2:
   version "2.10.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
 
+nanoid@^3.1.22:
+  version "3.1.23"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.23.tgz#f744086ce7c2bc47ee0a8472574d5c78e4183a81"
+  integrity sha512-FiB0kzdP0FFVGDKlRLEQ1BgDzU87dy5NnzjeW9YZNt+/c3+q82EQDUwniSAUxp/F0gFNI1ZhKU1FqYsMuqZVnw==
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -5138,15 +5140,7 @@ postcss@^6.0, postcss@^6.0.0, postcss@^6.0.1, postcss@^6.0.14, postcss@^6.0.16,
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
-postcss@^7.0.0:
-  version "7.0.1"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.1.tgz#db20ca4fc90aa56809674eea75864148c66b67fa"
-  dependencies:
-    chalk "^2.4.1"
-    source-map "^0.6.1"
-    supports-color "^5.4.0"
-
-postcss@^7.0.1, postcss@^7.0.2, postcss@^7.0.5, postcss@^7.0.6, postcss@^7.0.7:
+postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.2, postcss@^7.0.5, postcss@^7.0.6, postcss@^7.0.7:
   version "7.0.14"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.14.tgz#4527ed6b1ca0d82c53ce5ec1a2041c2346bbd6e5"
   integrity sha512-NsbD6XUUMZvBxtQAJuWDJeeC4QFsmWsfozWxCJPWf3M55K9iu2iMDaKqyoOdTJ1R4usBXuxlVFAIo8rZPQD4Bg==
@@ -5155,6 +5149,15 @@ postcss@^7.0.1, postcss@^7.0.2, postcss@^7.0.5, postcss@^7.0.6, postcss@^7.0.7:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
+postcss@^8.2.10:
+  version "8.2.10"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.10.tgz#ca7a042aa8aff494b334d0ff3e9e77079f6f702b"
+  integrity sha512-b/h7CPV7QEdrqIxtAf2j31U5ef05uBDuvoXv6L51Q4rcS1jdlXAVKJv+atCFdUXYl9dyTHGyoMzIepwowRJjFw==
+  dependencies:
+    colorette "^1.2.2"
+    nanoid "^3.1.22"
+    source-map "^0.6.1"
+
 prelude-ls@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
@@ -5966,13 +5969,7 @@ supports-color@^4.0.0:
   dependencies:
     has-flag "^2.0.0"
 
-supports-color@^5.3.0, supports-color@^5.4.0:
-  version "5.4.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
-  dependencies:
-    has-flag "^3.0.0"
-
-supports-color@^5.5.0:
+supports-color@^5.3.0, supports-color@^5.4.0, supports-color@^5.5.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
   integrity sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==