diff --git a/package.json b/package.json
index ce22072..17e17b0 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "bs58": "^4.0.1",
     "buffer": "^5.1.0",
     "clone": "^2.1.1",
-    "core-js": "^2.6.5",
+    "core-js": "^3.1.1",
     "crypto-conditions": "^2.0.1",
     "decamelize": "^3.2.0",
     "es6-promise": "^4.2.4",