diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index bef400aa35d..2d8e0242472 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -376,8 +376,8 @@ importers:
         specifier: ^8.3.1
         version: 8.4.32
       postcss-custom-media:
-        specifier: ^10.0.1
-        version: 10.0.1(postcss@8.4.32)
+        specifier: ^11.0.4
+        version: 11.0.4(postcss@8.4.32)
       postcss-discard-comments:
         specifier: ^6.0.1
         version: 6.0.1(postcss@8.4.32)
@@ -3399,40 +3399,40 @@ packages:
       '@cspotcode/source-map-consumer': 0.8.0
     dev: true
 
-  /@csstools/cascade-layer-name-parser@1.0.5(@csstools/css-parser-algorithms@2.3.2)(@csstools/css-tokenizer@2.2.1):
-    resolution: {integrity: sha512-v/5ODKNBMfBl0us/WQjlfsvSlYxfZLhNMVIsuCPib2ulTwGKYbKJbwqw671+qH9Y4wvWVnu7LBChvml/wBKjFg==}
-    engines: {node: ^14 || ^16 || >=18}
+  /@csstools/cascade-layer-name-parser@2.0.3(@csstools/css-parser-algorithms@3.0.3)(@csstools/css-tokenizer@3.0.2):
+    resolution: {integrity: sha512-KUcKk2oe7666aaeY+yxhy5TB0AN5x2Pi/ZJ23fbO8A0TEcLpA+VhVIw9s+6hTsAQHr8Fqc8p4RClsxxsmuIn1A==}
+    engines: {node: '>=18'}
     peerDependencies:
-      '@csstools/css-parser-algorithms': ^2.3.2
-      '@csstools/css-tokenizer': ^2.2.1
+      '@csstools/css-parser-algorithms': ^3.0.3
+      '@csstools/css-tokenizer': ^3.0.2
     dependencies:
-      '@csstools/css-parser-algorithms': 2.3.2(@csstools/css-tokenizer@2.2.1)
-      '@csstools/css-tokenizer': 2.2.1
+      '@csstools/css-parser-algorithms': 3.0.3(@csstools/css-tokenizer@3.0.2)
+      '@csstools/css-tokenizer': 3.0.2
     dev: true
 
-  /@csstools/css-parser-algorithms@2.3.2(@csstools/css-tokenizer@2.2.1):
-    resolution: {integrity: sha512-sLYGdAdEY2x7TSw9FtmdaTrh2wFtRJO5VMbBrA8tEqEod7GEggFmxTSK9XqExib3yMuYNcvcTdCZIP6ukdjAIA==}
-    engines: {node: ^14 || ^16 || >=18}
+  /@csstools/css-parser-algorithms@3.0.3(@csstools/css-tokenizer@3.0.2):
+    resolution: {integrity: sha512-15WQTALDyxAwSgAvLt7BksAssiSrNNhTv4zM7qX9U6R7FtpNskVVakzWQlYODlwPwXhGpKPmB10LM943pxMe7w==}
+    engines: {node: '>=18'}
     peerDependencies:
-      '@csstools/css-tokenizer': ^2.2.1
+      '@csstools/css-tokenizer': ^3.0.2
     dependencies:
-      '@csstools/css-tokenizer': 2.2.1
+      '@csstools/css-tokenizer': 3.0.2
     dev: true
 
-  /@csstools/css-tokenizer@2.2.1:
-    resolution: {integrity: sha512-Zmsf2f/CaEPWEVgw29odOj+WEVoiJy9s9NOv5GgNY9mZ1CZ7394By6wONrONrTsnNDv6F9hR02nvFihrGVGHBg==}
-    engines: {node: ^14 || ^16 || >=18}
+  /@csstools/css-tokenizer@3.0.2:
+    resolution: {integrity: sha512-IuTRcD53WHsXPCZ6W7ubfGqReTJ9Ra0yRRFmXYP/Re8hFYYfoIYIK4080X5luslVLWimhIeFq0hj09urVMQzTw==}
+    engines: {node: '>=18'}
     dev: true
 
-  /@csstools/media-query-list-parser@2.1.5(@csstools/css-parser-algorithms@2.3.2)(@csstools/css-tokenizer@2.2.1):
-    resolution: {integrity: sha512-IxVBdYzR8pYe89JiyXQuYk4aVVoCPhMJkz6ElRwlVysjwURTsTk/bmY/z4FfeRE+CRBMlykPwXEVUg8lThv7AQ==}
-    engines: {node: ^14 || ^16 || >=18}
+  /@csstools/media-query-list-parser@4.0.1(@csstools/css-parser-algorithms@3.0.3)(@csstools/css-tokenizer@3.0.2):
+    resolution: {integrity: sha512-dMr9PcN2B0TzxBFk6r+08Ln39aCti7SJeXB671JcXB1ZTPHqs4hpheRpL2vPPGRyXiQwW/UexvOej7Nw0Janxg==}
+    engines: {node: '>=18'}
     peerDependencies:
-      '@csstools/css-parser-algorithms': ^2.3.2
-      '@csstools/css-tokenizer': ^2.2.1
+      '@csstools/css-parser-algorithms': ^3.0.3
+      '@csstools/css-tokenizer': ^3.0.2
     dependencies:
-      '@csstools/css-parser-algorithms': 2.3.2(@csstools/css-tokenizer@2.2.1)
-      '@csstools/css-tokenizer': 2.2.1
+      '@csstools/css-parser-algorithms': 3.0.3(@csstools/css-tokenizer@3.0.2)
+      '@csstools/css-tokenizer': 3.0.2
     dev: true
 
   /@csstools/postcss-global-data@2.1.0(postcss@8.4.32):
@@ -12369,7 +12369,7 @@ packages:
     resolution: {integrity: sha512-oWb1Z6mkHIskLzEJ/XWX0srkpkTQ7vaopMQkyaEIoq0fmtFVxOthb8cCxeT+p3ynTdkk/RZwbgG4brR5BeWECw==}
     engines: {node: '>= 4.0'}
     os: [darwin]
-    deprecated: The v1 package contains DANGEROUS / INSECURE binaries. Upgrade to safe fsevents v2
+    deprecated: Upgrade to fsevents v2 to mitigate potential security issues
     requiresBuild: true
     dependencies:
       bindings: 1.5.0
@@ -18610,16 +18610,16 @@ packages:
       postcss-value-parser: 4.2.0
     dev: true
 
-  /postcss-custom-media@10.0.1(postcss@8.4.32):
-    resolution: {integrity: sha512-fil7cosvzlIAYmZJPtNFcTH0Er7a3GveEK4q5Y/L24eWQHmiw8Fv/E5DMkVpdbNjkGzJxrvowOSt/Il9HZ06VQ==}
-    engines: {node: ^14 || ^16 || >=18}
+  /postcss-custom-media@11.0.4(postcss@8.4.32):
+    resolution: {integrity: sha512-fz6+8rikAQZHsDwy2EEdeE0JlOaYRz1O0WNyrENkC21nEQfp2etnLcP4V1igieGG5mKokfLmH6lLrBR8kMRUfA==}
+    engines: {node: '>=18'}
     peerDependencies:
       postcss: ^8.4
     dependencies:
-      '@csstools/cascade-layer-name-parser': 1.0.5(@csstools/css-parser-algorithms@2.3.2)(@csstools/css-tokenizer@2.2.1)
-      '@csstools/css-parser-algorithms': 2.3.2(@csstools/css-tokenizer@2.2.1)
-      '@csstools/css-tokenizer': 2.2.1
-      '@csstools/media-query-list-parser': 2.1.5(@csstools/css-parser-algorithms@2.3.2)(@csstools/css-tokenizer@2.2.1)
+      '@csstools/cascade-layer-name-parser': 2.0.3(@csstools/css-parser-algorithms@3.0.3)(@csstools/css-tokenizer@3.0.2)
+      '@csstools/css-parser-algorithms': 3.0.3(@csstools/css-tokenizer@3.0.2)
+      '@csstools/css-tokenizer': 3.0.2
+      '@csstools/media-query-list-parser': 4.0.1(@csstools/css-parser-algorithms@3.0.3)(@csstools/css-tokenizer@3.0.2)
       postcss: 8.4.32
     dev: true
 
diff --git a/polaris-react/package.json b/polaris-react/package.json
index 385ada3e804..5ab566ba055 100644
--- a/polaris-react/package.json
+++ b/polaris-react/package.json
@@ -102,7 +102,7 @@
     "http-server": "^14.1.1",
     "js-yaml": "^4.1.0",
     "postcss": "^8.3.1",
-    "postcss-custom-media": "^10.0.1",
+    "postcss-custom-media": "^11.0.4",
     "postcss-discard-comments": "^6.0.1",
     "postcss-import": "^16.1.0 ",
     "postcss-loader": "^4.2.0",