diff --git a/package.json b/package.json
index 831b3d2..7a43824 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "prettier": "^1.19.1",
     "react": "^16.13.0",
     "react-test-renderer": "^16.13.0",
-    "typescript": "^3.8.3",
+    "typescript": "^4.2.3",
     "yorkie": "^2.0.0"
   },
   "peerDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 2aad950..5b6696c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -16185,10 +16185,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-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@^4.2.3:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.2.3.tgz#39062d8019912d43726298f09493d598048c1ce3"
+  integrity sha512-qOcYwxaByStAWrBf4x0fibwZvMRG+r4cQoTjbPtUlrWjBHbmCAww1i448U0GJ+3cNNEtebDteo/cHOR3xJ4wEw==
 
 umi-webpack-bundle-analyzer@3.5.0:
   version "3.5.0"