diff --git a/remix-lib/src/execution/txRunner.js b/remix-lib/src/execution/txRunner.js
index 35ff7f1920..cdc0dae515 100644
--- a/remix-lib/src/execution/txRunner.js
+++ b/remix-lib/src/execution/txRunner.js
@@ -32,7 +32,7 @@ class TxRunner {
   }
 
   _executeTx (tx, gasPrice, api, promptCb, callback) {
-    if (gasPrice) tx.gasPrice = executionContext.web3().toHex(gasPrice)
+    if (gasPrice) tx.gasPrice = executionContext.web3().utils.toHex(gasPrice)
     if (api.personalMode()) {
       promptCb(
         (value) => {
diff --git a/remix-lib/src/universalDapp.js b/remix-lib/src/universalDapp.js
index d98890ad63..3a76f06cf2 100644
--- a/remix-lib/src/universalDapp.js
+++ b/remix-lib/src/universalDapp.js
@@ -201,7 +201,7 @@ module.exports = class UniversalDApp {
       if (error) {
         callback(error)
       } else {
-        callback(null, executionContext.web3().fromWei(balance, 'ether'))
+        callback(null, executionContext.web3().utils.fromWei(balance, 'ether'))
       }
     })
   }