diff --git a/package-lock.json b/package-lock.json
index 1082eb7..a8e3e4a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17308,9 +17308,9 @@
       }
     },
     "rollup-plugin-postcss": {
-      "version": "2.9.0",
-      "resolved": "https://registry.npmjs.org/rollup-plugin-postcss/-/rollup-plugin-postcss-2.9.0.tgz",
-      "integrity": "sha512-Y7qDwlqjZMBexbB1kRJf+jKIQL8HR6C+ay53YzN+nNJ64hn1PNZfBE3c61hFUhD//zrMwmm7uBW30RuTi+CD0w==",
+      "version": "3.1.8",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-postcss/-/rollup-plugin-postcss-3.1.8.tgz",
+      "integrity": "sha512-JHnGfW8quNc6ePxEkZ05HEZ1YiRxDgY9RKEetMfsrwxR2kh/d90OVScTc6b1c2Q17Cs/5TRYL+1uddG21lQe3w==",
       "dev": true,
       "requires": {
         "chalk": "^4.0.0",
@@ -17323,7 +17323,7 @@
         "postcss-load-config": "^2.1.0",
         "postcss-modules": "^2.0.0",
         "promise.series": "^0.2.0",
-        "resolve": "^1.16.0",
+        "resolve": "^1.16.1",
         "rollup-pluginutils": "^2.8.2",
         "safe-identifier": "^0.4.1",
         "style-inject": "^0.3.0"
diff --git a/package.json b/package.json
index cea55b1..6f1ac68 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "react": "^16.14.0",
     "react-bootstrap": "^0.32.1",
     "react-dom": "^16.13.1",
-    "rollup-plugin-postcss": "^2.9.0",
+    "rollup-plugin-postcss": "^3.1.8",
     "ts-loader": "^6.2.2",
     "tsdx": "^0.14.1",
     "tslib": "^1.14.0",