diff --git a/package.json b/package.json
index 99d2e9f73..428be3ed1 100644
--- a/package.json
+++ b/package.json
@@ -136,7 +136,7 @@
     "source-map-support": "^0.5.10",
     "sourcegraph": "^24.0.0",
     "ts-node": "^8.0.2",
-    "typescript": "^3.8.3"
+    "typescript": "^3.9.3"
   },
   "dependencies": {
     "ignore": "^5.0.5",
diff --git a/yarn.lock b/yarn.lock
index 2aaf74501..60eb6443e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7649,10 +7649,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.8.3:
-  version "3.8.3"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
+typescript@^3.9.3:
+  version "3.9.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.3.tgz#d3ac8883a97c26139e42df5e93eeece33d610b8a"
+  integrity sha512-D/wqnB2xzNFIcoBG9FG8cXRDjiqSTbG2wd8DMZeQyJlP1vfTkIxH4GKveWaEBYySKIg+USu+E+EDIR47SqnaMQ==
 
 uglify-js@^3.1.4:
   version "3.4.9"