diff --git a/libs/remix-simulator/package.json b/libs/remix-simulator/package.json
index 61e85c53e0c..2efa58c3ea8 100644
--- a/libs/remix-simulator/package.json
+++ b/libs/remix-simulator/package.json
@@ -37,6 +37,7 @@
     "rlp": "^3.0.0",
     "string-similarity": "^4.0.4",
     "time-stamp": "^2.0.0",
+    "tslib": "^2.3.0",
     "web3": "^4.1.1",
     "web3-utils": "^4.0.5"
   },