diff --git a/remix-lib/package.json b/remix-lib/package.json
index dedb7162f1..1fba0d122b 100644
--- a/remix-lib/package.json
+++ b/remix-lib/package.json
@@ -20,6 +20,7 @@
     "ethereumjs-util": "^5.1.2",
     "ethereumjs-vm": "3.0.0",
     "ethers": "^4.0.27",
+    "events": "^3.0.0",
     "fast-async": "^6.1.2",
     "solc": "^0.5.0",
     "web3": "0.20.6"