diff --git a/package-lock.json b/package-lock.json
index 8ee10a16..73327f58 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10955,9 +10955,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.5.tgz",
-      "integrity": "sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==",
+      "version": "4.3.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz",
+      "integrity": "sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==",
       "dev": true
     },
     "typescript-language-server": {
diff --git a/package.json b/package.json
index c016c3e5..b38d2754 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "remark-preset-lint-recommended": "*",
     "stylelint": "^13.6.1",
     "stylelint-config-prettier": "^8.0.2",
-    "typescript": "^3.9.5",
+    "typescript": "^4.3.5",
     "typescript-language-server": "^0.4.0",
     "vscode-css-languageserver-bin": "^1.4.0",
     "vscode-html-languageserver-bin": "^1.4.0",