diff --git a/package.json b/package.json
index 132dfd8..42a86ff 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "rollup-plugin-pegjs": "^2.1.3",
     "rollup-plugin-terser": "^5.0.0",
     "rollup-plugin-typescript2": "^0.21.2",
-    "typescript": "^3.5.2"
+    "typescript": "^4.9.5"
   },
   "scripts": {
     "build": "rollup --config rollup.config.js --environment NODE_ENV:production",
diff --git a/yarn.lock b/yarn.lock
index aef6f6a..da05eb2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1128,10 +1128,10 @@ tslib@1.9.3:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
   integrity sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==
 
-typescript@^3.5.2:
-  version "3.5.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
-  integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
+typescript@^4.9.5:
+  version "4.9.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.5.tgz#095979f9bcc0d09da324d58d03ce8f8374cbe65a"
+  integrity sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==
 
 union-value@^1.0.0:
   version "1.0.1"