diff --git a/package-lock.json b/package-lock.json
index 89f3b2c..b0681c3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2371,6 +2371,14 @@
         "tiny-glob": "^0.2.6",
         "tslib": "^1.10.0",
         "typescript": "^3.7.4"
+      },
+      "dependencies": {
+        "typescript": {
+          "version": "3.9.7",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
+          "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==",
+          "dev": true
+        }
       }
     },
     "minimist": {
@@ -3823,9 +3831,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.7.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.5.tgz",
-      "integrity": "sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw==",
+      "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 f86555c..6b50f2e 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,6 @@
   },
   "devDependencies": {
     "microbundle": "^0.12.0-next.7",
-    "typescript": "^3.7.5"
+    "typescript": "^4.0.5"
   }
 }