diff --git a/graphql/graphql-ui/package.json b/graphql/graphql-ui/package.json
index 50134b09fc..23593d0dc2 100644
--- a/graphql/graphql-ui/package.json
+++ b/graphql/graphql-ui/package.json
@@ -45,7 +45,7 @@
     "less": "^4.2.0",
     "less-loader": "^11.1.3",
     "mini-css-extract-plugin": "^2.7.6",
-    "postcss": "^8.5.10",
+    "postcss": "^8.5.18",
     "postcss-loader": "^7.3.3",
     "source-map-loader": "^4.0.1"
   }
diff --git a/graphql/graphql-ui/yarn.lock b/graphql/graphql-ui/yarn.lock
index 586e42c0df..0fe38232c5 100644
--- a/graphql/graphql-ui/yarn.lock
+++ b/graphql/graphql-ui/yarn.lock
@@ -2554,12 +2554,7 @@ path-type@^4.0.0:
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-4.0.0.tgz#84ed01c0a7ba380afe09d90a8c180dcd9d03043b"
   integrity sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==
 
-picocolors@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.0.1.tgz#a8ad579b571952f0e5d25892de5445bcfe25aaa1"
-  integrity sha512-anP1Z8qwhkbmu7MFP5iTt+wQKXgwzf7zTyGlcdzabySa9vd0Xt392U0rVmz9poOaBj0uHJKyyo9/upk0HrEQew==
-
-picocolors@^1.1.1:
+picocolors@^1.0.0, picocolors@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.1.1.tgz#3d321af3eab939b083c8f929a1d12cda81c26b6b"
   integrity sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==
@@ -2638,7 +2633,7 @@ postcss-value-parser@^4.1.0:
   resolved "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.1.0.tgz#443f6a20ced6481a2bda4fa8532a6e55d789a2cb"
   integrity sha512-97DXOFbQJhk71ne5/Mt6cOu6yxsSfM0QGQyl0L25Gca4yGWEGJaig7l7gbCX623VqTBNGLRLaVUCnNkcedlRSQ==
 
-postcss@8.5.16, postcss@^7.0.14, postcss@^7.0.32, postcss@^7.0.5, postcss@^7.0.6, postcss@^8.5.10:
+postcss@8.5.16, postcss@^7.0.14, postcss@^7.0.32, postcss@^7.0.5, postcss@^7.0.6:
   version "8.5.16"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.16.tgz#1230ce0b5df354c24c0ea45f99ce5f6a88279d28"
   integrity sha512-vuwillviilfKZsg0VGj5R/YwwcHx4SLsIOI/7K6mQkWx+l5cUHTjj5g0AasTBcyXsbfTgrwsUNmVUb5xVwyPwg==
@@ -2647,6 +2642,15 @@ postcss@8.5.16, postcss@^7.0.14, postcss@^7.0.32, postcss@^7.0.5, postcss@^7.0.6
     picocolors "^1.1.1"
     source-map-js "^1.2.1"
 
+postcss@^8.5.18:
+  version "8.5.18"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.18.tgz#8717e5a33a3b15fe8a538d2431a1e1bbbfb07614"
+  integrity sha512-xdB1oSLHbz1vRWgCDalrCqEFTWzFlhqFC5tIHLMOSUIjhm3XXQ1qrFy8S/ESr1JYRRXqM3c1QFiMZUJdUTqyMQ==
+  dependencies:
+    nanoid "^3.3.12"
+    picocolors "^1.1.1"
+    source-map-js "^1.2.1"
+
 prettier@^3.5.3:
   version "3.9.4"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.4.tgz#a9c477cf1614376bd1f6bbc593d8c0d414bcec87"
@@ -2927,12 +2931,7 @@ shebang-regex@^3.0.0:
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-3.0.0.tgz#ae16f1644d873ecad843b0307b143362d4c42172"
   integrity sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==
 
-source-map-js@^1.0.2:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.0.tgz#16b809c162517b5b8c3e7dcd315a2a5c2612b2af"
-  integrity sha512-itJW8lvSA0TXEphiRoawsCksnlf8SyvmFzIhltqAHluXd88pkCd+cXJVHTDwdCr0IzwptSm035IHQktUu1QUMg==
-
-source-map-js@^1.2.1:
+source-map-js@^1.0.2, source-map-js@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.1.tgz#1ce5650fddd87abc099eda37dcff024c2667ae46"
   integrity sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==