diff --git a/package.json b/package.json
index c74b88b..cb3a00d 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   },
   "dependencies": {
     "promise-duplex": "^5.0.3",
-    "tslib": "^1.13.0"
+    "tslib": "^2.0.1"
   },
   "devDependencies": {
     "@types/chai": "^4.2.12",