diff --git a/package-lock.json b/package-lock.json
index 051eaf2d2eca..80e6881ebcbc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "license": "(MIT AND CC-BY-4.0)",
       "dependencies": {
         "@github/failbot": "0.8.0",
-        "@primer/css": "^19.4.0",
+        "@primer/css": "^20.4.2",
         "@primer/octicons": "17.0.0",
         "@primer/octicons-react": "17.0.0",
         "@primer/react": "^34.6.0",
@@ -3569,20 +3569,20 @@
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     },
     "node_modules/@primer/css": {
-      "version": "19.4.0",
-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-19.4.0.tgz",
-      "integrity": "sha512-Ptg9eTw140v97M+jdxP8vjC4BsiWjAvhMA0qjPx1rsH9oHfIrAqLEBDXkfMl5wYZrEflatyHAbxa4zos5DJttA==",
+      "version": "20.4.2",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.4.2.tgz",
+      "integrity": "sha512-EYfDXA80ERXwncs4KTjnOQ41pqz7auRmg7sSNCP9i39W7hqIEl2HAkhtbb3ii34o/48rGSZzOMnxHUL8Nk0c8w==",
       "dependencies": {
-        "@primer/primitives": "^7.4.0"
+        "@primer/primitives": "^7.9.0"
       },
       "engines": {
         "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
       }
     },
     "node_modules/@primer/css/node_modules/@primer/primitives": {
-      "version": "7.4.0",
-      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.4.0.tgz",
-      "integrity": "sha512-gD6yHXN7YKox/bdUNgxhoSS/WXZVaORK1r4dOAyTrdoPrLV/ucIfRInPyVcTF+Mqr0zcTFJtiMtuA5Y8CSyOEg=="
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.9.0.tgz",
+      "integrity": "sha512-ZHHfwB0z0z6nDJp263gyGIClYDy+rl0nwqyi4qhcv3Cxhkmtf+If2KVjr6FQqBBFfi1wQwUzaax2FBvfEMFBnw=="
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     "node_modules/@primer/octicons": {
       "version": "17.0.0",
@@ -25101,17 +25101,17 @@
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     },
     "@primer/css": {
-      "version": "19.4.0",
-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-19.4.0.tgz",
-      "integrity": "sha512-Ptg9eTw140v97M+jdxP8vjC4BsiWjAvhMA0qjPx1rsH9oHfIrAqLEBDXkfMl5wYZrEflatyHAbxa4zos5DJttA==",
+      "version": "20.4.2",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.4.2.tgz",
+      "integrity": "sha512-EYfDXA80ERXwncs4KTjnOQ41pqz7auRmg7sSNCP9i39W7hqIEl2HAkhtbb3ii34o/48rGSZzOMnxHUL8Nk0c8w==",
       "requires": {
-        "@primer/primitives": "^7.4.0"
+        "@primer/primitives": "^7.9.0"
       },
       "dependencies": {
         "@primer/primitives": {
-          "version": "7.4.0",
-          "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.4.0.tgz",
-          "integrity": "sha512-gD6yHXN7YKox/bdUNgxhoSS/WXZVaORK1r4dOAyTrdoPrLV/ucIfRInPyVcTF+Mqr0zcTFJtiMtuA5Y8CSyOEg=="
+          "version": "7.9.0",
+          "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.9.0.tgz",
+          "integrity": "sha512-ZHHfwB0z0z6nDJp263gyGIClYDy+rl0nwqyi4qhcv3Cxhkmtf+If2KVjr6FQqBBFfi1wQwUzaax2FBvfEMFBnw=="
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diff --git a/package.json b/package.json
index 0dd6e1a9cf95..a401d98d31b7 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   ],
   "dependencies": {
     "@github/failbot": "0.8.0",
-    "@primer/css": "^19.4.0",
+    "@primer/css": "^20.4.2",
     "@primer/octicons": "17.0.0",
     "@primer/octicons-react": "17.0.0",
     "@primer/react": "^34.6.0",