diff --git a/package-lock.json b/package-lock.json
index 2a58d3bdf..34489ce5f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27366,9 +27366,9 @@
       }
     },
     "typescript": {
-      "version": "3.9.8",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.8.tgz",
-      "integrity": "sha512-nDbnFkUZZjkQ92qwKX+C+jtk4OGfU8H9toSEs3uAsl8cxLjG2sqQm6leF/pLWvm9FAEJ6KHkYMAbHYaY2ITeVg==",
+      "version": "3.9.9",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.9.tgz",
+      "integrity": "sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==",
       "dev": true
     },
     "uglify-js": {
diff --git a/package.json b/package.json
index 7e7b69883..aa0b084c8 100644
--- a/package.json
+++ b/package.json
@@ -92,7 +92,7 @@
     "to-string-loader": "1.1.6",
     "tslint": "5.20.1",
     "tslint-config-standard": "9.0.0",
-    "typescript": "3.9.8",
+    "typescript": "3.9.9",
     "webpack": "^5.21.2",
     "webpack-dev-server": "3.11.2",
     "webpack-merge": "5.7.3"