diff --git a/package.json b/package.json
index cc5cf0a..ac0f8b0 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "tape": "^4.10.2",
     "tslint": "^5.17.0",
     "tslint-config-prettier": "^1.18.0",
-    "typescript": "^3.5.1"
+    "typescript": "^4.9.4"
   },
   "husky": {
     "hooks": {
diff --git a/yarn.lock b/yarn.lock
index 30419ff..a4586d9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2018,10 +2018,10 @@ tsutils@^2.29.0:
   dependencies:
     tslib "^1.8.1"
 
-typescript@^3.5.1:
-  version "3.5.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.1.tgz#ba72a6a600b2158139c5dd8850f700e231464202"
-  integrity sha512-64HkdiRv1yYZsSe4xC1WVgamNigVYjlssIoaH2HcZF0+ijsk5YK2g0G34w9wJkze8+5ow4STd22AynfO6ZYYLw==
+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==
 
 union-value@^1.0.0:
   version "1.0.0"