diff --git a/src/app/execution/txRunner.js b/src/app/execution/txRunner.js
index 8b0542dd2f..88575891a0 100644
--- a/src/app/execution/txRunner.js
+++ b/src/app/execution/txRunner.js
@@ -94,7 +94,7 @@ TxRunner.prototype.execute = function (args, callback) {
         // NOTE: estimateGas very likely will return a large limit if execution of the code failed
         //       we want to be able to run the code in order to debug and find the cause for the failure
 
-        var warnEstimation = ' An important gas estimation might also be the sign of a problem in the contract code. Please check loops and be sure you did not sent value to a non payable function (that\'s also the reason of strong gas estimation).'
+        var warnEstimation = " An important gas estimation might also be the sign of a problem in the contract code. Please check loops and be sure you did not sent value to a non payable function (that's also the reason of strong gas estimation)."
         if (gasEstimation > gasLimit) {
           return callback('Gas required exceeds limit: ' + gasLimit + '. ' + warnEstimation)
         }