diff --git a/package.json b/package.json
index 463e506..283ede1 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,6 @@
   "devDependencies": {
     "@clark/eslint-config-typescript": "^1.24.1",
     "eslint": "^6.8.0",
-    "typescript": "^3.8.3"
+    "typescript": "^4.9.4"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 8b5449f..e31e3d2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1600,10 +1600,10 @@ type-fest@^0.8.1:
   resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-0.8.1.tgz#09e249ebde851d3b1e48d27c105444667f17b83d"
   integrity sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==
 
-typescript@^3.8.3:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
+typescript@^4.9.4:
+  version "4.9.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.4.tgz#a2a3d2756c079abda241d75f149df9d561091e78"
+  integrity sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==
 
 uri-js@^4.2.2:
   version "4.2.2"