diff --git a/package-lock.json b/package-lock.json
index 011170375d26..46ff3d198b4f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
         "@alex_neo/jest-expect-message": "^1.0.5",
         "@hapi/accept": "^5.0.2",
         "@primer/components": "^31.1.0",
-        "@primer/css": "^18.2.0",
+        "@primer/css": "^20.7.1",
         "@primer/octicons": "^16.1.1",
         "@primer/octicons-react": "^16.1.1",
         "accept-language-parser": "^1.5.0",
@@ -3482,20 +3482,20 @@
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-      "version": "18.2.0",
-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-18.2.0.tgz",
-      "integrity": "sha512-tU84BKF4HfhyyW7eB/BijcSf862JGIKcm5Z/dFdoZW7AFM1PpMDYiUp8h4j5XtsWxtXSqe3xxqTGTFXsmKGPtw==",
+      "version": "20.7.1",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.7.1.tgz",
+      "integrity": "sha512-NcTKs6PZtT7btF8GlYvoRMq8XBJ8TWGA8VBPG+dAYHm/38gx8JwKSiZG0Dt2Ue1AYoV/75Slp/mUPDnFCmbOOQ==",
       "dependencies": {
-        "@primer/primitives": "^6.1.0"
+        "@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": "6.1.0",
-      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-6.1.0.tgz",
-      "integrity": "sha512-gwSVf5rVf2CMa/bU3/47LZosDHNfODMRJfKi7uJOqHWABVNl6Lf+thDM7Jb8tS9sEQQsUnrLDiGNjCScS81IXA=="
+      "version": "7.10.0",
+      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.10.0.tgz",
+      "integrity": "sha512-DdLHq21e93R9qDHyRuRpytBLY0Up9IwNWMOUgPNW6lRSng4N4+IdUlLS3Ekbasmxfs8Z8vKS8aezeYovQ5qsxQ=="
     },
     "node_modules/@primer/octicons": {
       "version": "16.1.1",
@@ -8426,6 +8426,16 @@
         "node": ">= 0.8.0"
       }
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+    "node_modules/escodegen/node_modules/source-map": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "dev": true,
+      "optional": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/escodegen/node_modules/type-check": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -18360,6 +18370,14 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
+    "node_modules/rehype-highlight/node_modules/highlight.js": {
+      "version": "11.3.1",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-11.3.1.tgz",
+      "integrity": "sha512-PUhCRnPjLtiLHZAQ5A/Dt5F8cWZeMyj9KRsACsWT+OD6OP0x6dp5OmT5jdx0JgEyPxPZZIPQpRN2TciUT7occw==",
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/rehype-highlight/node_modules/lowlight": {
       "version": "2.4.0",
       "resolved": "https://registry.npmjs.org/lowlight/-/lowlight-2.4.0.tgz",
@@ -20009,6 +20027,15 @@
         "node": ">= 0.8.0"
       }
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+    "node_modules/static-eval/node_modules/source-map": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "optional": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/static-eval/node_modules/type-check": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -20134,6 +20161,15 @@
         "util-deprecate": "~1.0.1"
       }
     },
+    "node_modules/static-module/node_modules/source-map": {
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "optional": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/static-module/node_modules/string_decoder": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
@@ -25338,17 +25374,17 @@
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     "@primer/css": {
-      "version": "18.2.0",
-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-18.2.0.tgz",
-      "integrity": "sha512-tU84BKF4HfhyyW7eB/BijcSf862JGIKcm5Z/dFdoZW7AFM1PpMDYiUp8h4j5XtsWxtXSqe3xxqTGTFXsmKGPtw==",
+      "version": "20.7.1",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.7.1.tgz",
+      "integrity": "sha512-NcTKs6PZtT7btF8GlYvoRMq8XBJ8TWGA8VBPG+dAYHm/38gx8JwKSiZG0Dt2Ue1AYoV/75Slp/mUPDnFCmbOOQ==",
       "requires": {
-        "@primer/primitives": "^6.1.0"
+        "@primer/primitives": "^7.9.0"
       },
       "dependencies": {
         "@primer/primitives": {
-          "version": "6.1.0",
-          "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-6.1.0.tgz",
-          "integrity": "sha512-gwSVf5rVf2CMa/bU3/47LZosDHNfODMRJfKi7uJOqHWABVNl6Lf+thDM7Jb8tS9sEQQsUnrLDiGNjCScS81IXA=="
+          "version": "7.10.0",
+          "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.10.0.tgz",
+          "integrity": "sha512-DdLHq21e93R9qDHyRuRpytBLY0Up9IwNWMOUgPNW6lRSng4N4+IdUlLS3Ekbasmxfs8Z8vKS8aezeYovQ5qsxQ=="
         }
       }
     },
@@ -29455,6 +29491,13 @@
           "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=",
           "dev": true
         },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true,
+          "optional": true
+        },
         "type-check": {
           "version": "0.3.2",
           "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -37010,6 +37053,11 @@
             "format": "^0.2.0"
           }
         },
+        "highlight.js": {
+          "version": "11.3.1",
+          "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-11.3.1.tgz",
+          "integrity": "sha512-PUhCRnPjLtiLHZAQ5A/Dt5F8cWZeMyj9KRsACsWT+OD6OP0x6dp5OmT5jdx0JgEyPxPZZIPQpRN2TciUT7occw=="
+        },
         "lowlight": {
           "version": "2.4.0",
           "resolved": "https://registry.npmjs.org/lowlight/-/lowlight-2.4.0.tgz",
@@ -38313,6 +38361,12 @@
           "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
           "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ="
         },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "optional": true
+        },
         "type-check": {
           "version": "0.3.2",
           "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -38412,6 +38466,12 @@
             "util-deprecate": "~1.0.1"
           }
         },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "optional": true
+        },
         "string_decoder": {
           "version": "1.1.1",
           "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
diff --git a/package.json b/package.json
index e0f5368c3301..f9917d978915 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "@alex_neo/jest-expect-message": "^1.0.5",
     "@hapi/accept": "^5.0.2",
     "@primer/components": "^31.1.0",
-    "@primer/css": "^18.2.0",
+    "@primer/css": "^20.7.1",
     "@primer/octicons": "^16.1.1",
     "@primer/octicons-react": "^16.1.1",
     "accept-language-parser": "^1.5.0",