diff --git a/package-lock.json b/package-lock.json
index 30b32046b8c1..6dacb92ec560 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
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-        "@primer/css": "^19.4.0",
+        "@primer/css": "^20.6.0",
         "@primer/octicons": "17.0.0",
         "@primer/octicons-react": "17.0.0",
         "@primer/react": "^34.7.1",
@@ -3563,20 +3563,20 @@
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-      "resolved": "https://registry.npmjs.org/@primer/css/-/css-19.4.0.tgz",
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+      "version": "20.6.0",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.6.0.tgz",
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       "dependencies": {
-        "@primer/primitives": "^7.4.0"
+        "@primer/primitives": "^7.9.0"
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         "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
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     "node_modules/@primer/css/node_modules/@primer/primitives": {
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-      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.4.0.tgz",
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+      "version": "7.10.0",
+      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.10.0.tgz",
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     "node_modules/@primer/octicons": {
       "version": "17.0.0",
@@ -8449,6 +8449,16 @@
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+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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+      "optional": true,
+      "engines": {
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@@ -25148,17 +25158,17 @@
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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": "20.6.0",
+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-20.6.0.tgz",
+      "integrity": "sha512-U+IDWTKkWgKr6lCsCKVe36523iWS+wozcTYBWWvjUQ8wuwOM3EsqNISJGJAL23yLv0dT9onLHqB3ovZfsl1Y9w==",
       "requires": {
-        "@primer/primitives": "^7.4.0"
+        "@primer/primitives": "^7.9.0"
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-          "version": "7.4.0",
-          "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.4.0.tgz",
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+          "version": "7.10.0",
+          "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-7.10.0.tgz",
+          "integrity": "sha512-DdLHq21e93R9qDHyRuRpytBLY0Up9IwNWMOUgPNW6lRSng4N4+IdUlLS3Ekbasmxfs8Z8vKS8aezeYovQ5qsxQ=="
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@@ -29165,6 +29175,13 @@
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           "dev": true
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+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
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           "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
diff --git a/package.json b/package.json
index 8a2cc8f52677..96ca68056b17 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
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   "dependencies": {
     "@github/failbot": "0.8.0",
-    "@primer/css": "^19.4.0",
+    "@primer/css": "^20.6.0",
     "@primer/react": "^34.7.1",
     "@primer/octicons": "17.0.0",
     "@primer/octicons-react": "17.0.0",