diff --git a/.changeset/evil-peaches-sin.md b/.changeset/evil-peaches-sin.md
new file mode 100644
index 0000000000..3513453f16
--- /dev/null
+++ b/.changeset/evil-peaches-sin.md
@@ -0,0 +1,5 @@
+---
+'@primer/css': patch
+---
+
+Update @primer/primitives peerDependencies to 10.x || 11.x
diff --git a/package.json b/package.json
index 571cf198fc..1d61384fc9 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "table": "^6.8.1"
   },
   "peerDependencies": {
-    "@primer/primitives": "9.x || 10.x"
+    "@primer/primitives": "10.x || 11.x"
   },
   "jest": {
     "testEnvironment": "node",