diff --git a/package.json b/package.json
index d818f99..7425329 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "rollup-watch": "4.3.1",
     "ts-jest": "24.0.0",
     "tslint": "5.13.1",
-    "typescript": "3.3.3333",
+    "typescript": "3.9.5",
     "uglify-es": "3.3.9"
   },
   "jest": {
diff --git a/yarn.lock b/yarn.lock
index 0626b8c..37ad802 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5036,10 +5036,10 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-typescript@3.3.3333:
-  version "3.3.3333"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.3.3333.tgz#171b2c5af66c59e9431199117a3bcadc66fdcfd6"
-  integrity sha512-JjSKsAfuHBE/fB2oZ8NxtRTk5iGcg6hkYXMnZ3Wc+b2RSqejEqTaem11mHASMnFilHrax3sLK0GDzcJrekZYLw==
+typescript@3.9.5:
+  version "3.9.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.5.tgz#586f0dba300cde8be52dd1ac4f7e1009c1b13f36"
+  integrity sha512-hSAifV3k+i6lEoCJ2k6R2Z/rp/H3+8sdmcn5NrS3/3kE7+RyZXm9aqvxWqjEXHAd8b0pShatpcdMTvEdvAJltQ==
 
 ua-parser-js@0.7.17:
   version "0.7.17"