diff --git a/package-lock.json b/package-lock.json
index 182a8a99c376..bb88f2b8910d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
         "@github/failbot": "0.8.0",
         "@hapi/accept": "^5.0.2",
         "@primer/components": "^33.1.0",
-        "@primer/css": "^19.1.1",
+        "@primer/css": "^20.4.1",
         "@primer/octicons": "^16.1.1",
         "@primer/octicons-react": "^16.2.0",
         "@react-aria/ssr": "^3.1.0",
@@ -3638,21 +3638,20 @@
       }
     },
     "node_modules/@primer/css": {
-      "version": "19.1.1",
-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-19.1.1.tgz",
-      "integrity": "sha512-QVwdNOJsLxOD6eTR5LDIdLWg2SIy+eZWMK4ywlLd8qZXJCngtJyTNO5PtSzgs0D9jlMS+dzxvlOOV6GcfLu1hw==",
-      "license": "MIT",
+      "version": "20.4.1",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.4.1.tgz",
+      "integrity": "sha512-jNO8JUmJea/ZMa8w7fWlYT4MWU15raVad04QW1ZZOcqyTyRWEB4Mh31PBj62XB6dfExbKnEC+XX0P4M9FjhwVQ==",
       "dependencies": {
-        "@primer/primitives": "^7.2.0"
+        "@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=="
     },
     "node_modules/@primer/octicons": {
       "version": "16.1.1",
@@ -25838,17 +25837,17 @@
       }
     },
     "@primer/css": {
-      "version": "19.1.1",
-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-19.1.1.tgz",
-      "integrity": "sha512-QVwdNOJsLxOD6eTR5LDIdLWg2SIy+eZWMK4ywlLd8qZXJCngtJyTNO5PtSzgs0D9jlMS+dzxvlOOV6GcfLu1hw==",
+      "version": "20.4.1",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.4.1.tgz",
+      "integrity": "sha512-jNO8JUmJea/ZMa8w7fWlYT4MWU15raVad04QW1ZZOcqyTyRWEB4Mh31PBj62XB6dfExbKnEC+XX0P4M9FjhwVQ==",
       "requires": {
-        "@primer/primitives": "^7.2.0"
+        "@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=="
         }
       }
     },
diff --git a/package.json b/package.json
index 4383c4124857..f5bc6147f3de 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "@github/failbot": "0.8.0",
     "@hapi/accept": "^5.0.2",
     "@primer/components": "^33.1.0",
-    "@primer/css": "^19.1.1",
+    "@primer/css": "^20.4.1",
     "@primer/octicons": "^16.1.1",
     "@primer/octicons-react": "^16.2.0",
     "@react-aria/ssr": "^3.1.0",