diff --git a/package.json b/package.json
index 6f9c4c233..dc1986dff 100644
--- a/package.json
+++ b/package.json
@@ -85,7 +85,7 @@
     "@graphql-codegen/schema-ast": "5.0.0",
     "@octokit/openapi-types": "27.0.0",
     "@parcel/watcher": "2.5.1",
-    "@primer/css": "22.0.2",
+    "@primer/css": "22.1.0",
     "@primer/octicons-react": "19.21.1",
     "@primer/primitives": "11.3.2",
     "@primer/react": "38.6.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 636f76e84..5dd4f0e03 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -55,8 +55,8 @@ importers:
         specifier: 2.5.1
         version: 2.5.1
       '@primer/css':
-        specifier: 22.0.2
-        version: 22.0.2(@primer/primitives@11.3.2)
+        specifier: 22.1.0
+        version: 22.1.0(@primer/primitives@11.3.2)
       '@primer/octicons-react':
         specifier: 19.21.1
         version: 19.21.1(react@19.2.3)
@@ -1722,8 +1722,8 @@ packages:
   '@primer/behaviors@1.9.0':
     resolution: {integrity: sha512-MIVSZlQGJzas44DZDwo4Dqiev289K918oDl/AcA+zTpQAjp+PrJ0LUxEnrSOapyivLYpRpmSCeF0XPh7NgXpCA==}
 
-  '@primer/css@22.0.2':
-    resolution: {integrity: sha512-FfXd1ga05oewKjDRi9cPmy7BSnb/6QOjTIxAtDj94Hoyk+qJxHhgvhbcnZwBfL3WKP6HeUT3PnsT9k+43Bmg3Q==}
+  '@primer/css@22.1.0':
+    resolution: {integrity: sha512-Nwg9QaRiBeu0BU6h+Su0X07daihX1obiuqGRG8y+SexOnvWhN2J5n4OFAvGfQsit07Y7Q6gGoK+yVU5tb8CtDA==}
     engines: {node: '>=16.0.0'}
     peerDependencies:
       '@primer/primitives': 10.x || 11.x
@@ -5797,6 +5797,7 @@ packages:
   whatwg-encoding@3.1.1:
     resolution: {integrity: sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==}
     engines: {node: '>=18'}
+    deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
   whatwg-mimetype@4.0.0:
     resolution: {integrity: sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==}
@@ -7979,7 +7980,7 @@ snapshots:
 
   '@primer/behaviors@1.9.0': {}
 
-  '@primer/css@22.0.2(@primer/primitives@11.3.2)':
+  '@primer/css@22.1.0(@primer/primitives@11.3.2)':
     dependencies:
       '@primer/primitives': 11.3.2