diff --git a/docx-wasm/package.json b/docx-wasm/package.json
index c310cd4..c52da93 100644
--- a/docx-wasm/package.json
+++ b/docx-wasm/package.json
@@ -26,7 +26,7 @@
     "npm-run-all": "4.1.5",
     "text-encoding": "0.7.0",
     "ts-loader": "6.2.2",
-    "typescript": "3.7.5",
+    "typescript": "3.9.7",
     "webpack": "4.39.3",
     "webpack-cli": "3.3.8",
     "webpack-dev-server": "3.8.0"
diff --git a/docx-wasm/yarn.lock b/docx-wasm/yarn.lock
index 597e4f7..afa8555 100644
--- a/docx-wasm/yarn.lock
+++ b/docx-wasm/yarn.lock
@@ -4204,10 +4204,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.7.5:
-  version "3.7.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.7.5.tgz#0692e21f65fd4108b9330238aac11dd2e177a1ae"
-  integrity sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw==
+typescript@3.9.7:
+  version "3.9.7"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
+  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
 uglify-js@3.4.x:
   version "3.4.10"