diff --git a/package.json b/package.json
index ea040ab..d20bf7c 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "@types/debug": "4.1.5",
     "@types/express": "4.17.7",
     "@types/node": "13.9.8",
-    "typescript": "3.9.5"
+    "typescript": "4.0.2"
   },
   "eslintConfig": {
     "extends": [
diff --git a/yarn.lock b/yarn.lock
index dab6dca..a9749f0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1344,10 +1344,10 @@ type-is@~1.6.17, type-is@~1.6.18:
     media-typer "0.3.0"
     mime-types "~2.1.24"
 
-typescript@3.9.5:
-  version "3.9.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.5.tgz#586f0dba300cde8be52dd1ac4f7e1009c1b13f36"
-  integrity sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==
+typescript@4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
+  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
 
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"