diff --git a/package-lock.json b/package-lock.json
index b1e7371..162b68d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2359,6 +2359,14 @@
         "tiny-glob": "^0.2.6",
         "tslib": "^1.10.0",
         "typescript": "^3.5.3"
+      },
+      "dependencies": {
+        "typescript": {
+          "version": "3.9.7",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
+          "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==",
+          "dev": true
+        }
       }
     },
     "minimist": {
@@ -3783,9 +3791,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.8.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
-      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.5.tgz",
+      "integrity": "sha512-ywmr/VrTVCmNTJ6iV2LwIrfG1P+lv6luD8sUJs+2eI9NLGigaN+nUQc13iHqisq7bra9lnmUSYqbJvegraBOPQ==",
       "dev": true
     },
     "unicode-canonical-property-names-ecmascript": {
diff --git a/package.json b/package.json
index 7237783..f661eaf 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,6 @@
   },
   "devDependencies": {
     "microbundle": "^0.12.0-next.7",
-    "typescript": "^3.7.5"
+    "typescript": "^4.0.5"
   }
 }