diff --git a/package-lock.json b/package-lock.json
index 4ad14b20..a9f229c9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -388,9 +388,9 @@
       "integrity": "sha512-lTqkx847PI7xEDYJntxZH89L2/aXInsyF2luSafe/+0fHOMjlBNXdH6th7f70qxLDhul7KZK0zC8V5ZIyHl0/g=="
     },
     "typescript": {
-      "version": "3.7.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.5.tgz",
-      "integrity": "sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw==",
+      "version": "3.9.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.2.tgz",
+      "integrity": "sha512-q2ktq4n/uLuNNShyayit+DTobV2ApPEo/6so68JaD5ojvc/6GClBipedB9zNWYxRSAlZXAe405Rlijzl6qDiSw==",
       "dev": true
     },
     "union": {
diff --git a/package.json b/package.json
index 72d7c083..613b25b9 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "http-server": "0.12.1",
     "rollup": "2.10.4",
     "rollup-plugin-css-only": "2.0.0",
-    "typescript": "3.7.5"
+    "typescript": "3.9.2"
   },
   "dependencies": {
     "@yume-chan/async-operation-manager": "^1.0.1",