diff --git a/package-lock.json b/package-lock.json
index c7a9485..5dfae0f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -177,9 +177,20 @@
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+      "resolved": "https://registry.npmjs.org/@primer/css/-/css-12.6.0.tgz",
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-          "resolved": "http://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
+          "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
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-          "resolved": "http://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
+          "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
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-      "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=",
-      "dev": true
+      "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
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-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
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@@ -3869,13 +3879,13 @@
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-          "resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
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-          "resolved": "http://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
+          "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
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-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
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-          "resolved": "http://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
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-              "resolved": "http://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
+              "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
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@@ -4505,7 +4515,7 @@
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-          "resolved": "http://registry.npmjs.org/globby/-/globby-6.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-6.1.0.tgz",
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@@ -4599,7 +4609,7 @@
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-          "resolved": "http://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-1.1.0.tgz",
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-              "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+              "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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@@ -4648,7 +4658,7 @@
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-          "resolved": "http://registry.npmjs.org/meow/-/meow-3.7.0.tgz",
+          "resolved": "https://registry.npmjs.org/meow/-/meow-3.7.0.tgz",
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@@ -4737,7 +4747,7 @@
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+          "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
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@@ -4755,7 +4765,7 @@
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-              "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+              "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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@@ -4778,7 +4788,7 @@
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-          "resolved": "http://registry.npmjs.org/postcss-less/-/postcss-less-0.14.0.tgz",
+          "resolved": "https://registry.npmjs.org/postcss-less/-/postcss-less-0.14.0.tgz",
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-              "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+              "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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@@ -4957,7 +4967,7 @@
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-          "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
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+          "resolved": "https://registry.npmjs.org/table/-/table-4.0.3.tgz",
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@@ -5102,7 +5112,7 @@
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-          "resolved": "http://registry.npmjs.org/yargs/-/yargs-3.32.0.tgz",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.32.0.tgz",
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diff --git a/package.json b/package.json
index 4130c23..498cc71 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "stylelint-selector-no-utility": "^4.0.0"
   },
   "dependencies": {
-    "@primer/css": "^12.3.1"
+    "@primer/css": "^12.6.0"
   },
   "scripts": {
     "test": "stylelint '**/*.scss'"