diff --git a/package.json b/package.json
index 03066f0..088b62d 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "hyperscript-helpers": "^3.0.3",
     "mithril": "^2.2.2",
     "normalize.css": "~8.0.1",
-    "typescript": "~5.3.3"
+    "typescript": "~5.4.2"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
diff --git a/yarn.lock b/yarn.lock
index 991790a..a6d4190 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2076,10 +2076,10 @@ typescript-plugin-css-modules@^5.0.2:
     stylus "^0.59.0"
     tsconfig-paths "^4.1.2"
 
-typescript@~5.3.3:
-  version "5.3.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.3.3.tgz#b3ce6ba258e72e6305ba66f5c9b452aaee3ffe37"
-  integrity sha512-pXWcraxM0uxAS+tN0AG/BF2TyqmHO014Z070UsJ+pFvYuRSq8KH8DmWpnbXe0pEPDHXZV3FcAbJkijJ5oNEnWw==
+typescript@~5.4.2:
+  version "5.4.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.4.2.tgz#0ae9cebcfae970718474fe0da2c090cad6577372"
+  integrity sha512-+2/g0Fds1ERlP6JsakQQDXjZdZMM+rqpamFZJEKh4kwTIn3iDkgKtby0CeNd5ATNZ4Ry1ax15TMx0W2V+miizQ==
 
 undici-types@~5.26.4:
   version "5.26.5"