diff --git a/lib/resources/multiPartyCall.js b/lib/resources/multiPartyCall.js
index 0fe35c6..31cce28 100644
--- a/lib/resources/multiPartyCall.js
+++ b/lib/resources/multiPartyCall.js
@@ -106,24 +106,24 @@ export class MultiPartyCall extends PlivoResource{
 
     if(params.ringTimeout || params.ringTimeout === 0){
       validParam('ringTimeout', params.ringTimeout, [String, Number], false)
-      if(Number.isInteger(params.ringTimeout)){
-        validRange('RingTimeout', params.ringTimeout, false, 15, 120)
-      }
-      else{
+      if(typeof(params.ringTimeout) === 'string'){
         validMultipleDestinationIntegers('ringTimeout', params.ringTimeout)
       }
+      else if (!Number.isInteger(params.ringTimeout) && typeof(params.ringTimeout) !== 'string'){
+        throw new InvalidRequestError("RingTimeout must be of type int or string")
+      }
     }
     else {
       params.ringTimeout = 45
     }
     if(params.delayDial){
       validParam('delayDial', params.delayDial, [String, Number], false)
-      if(Number.isInteger(params.delayDial)){
-        validRange('DelayDial', params.delayDial, false, 1, 120)
-      }
-      else{
+      if(typeof(params.delayDial) === 'string'){
         validMultipleDestinationIntegers('delayDial', params.delayDial)
       }
+      else if(!Number.isInteger(params.delayDial) && typeof(params.delayDial) !== 'string'){
+        throw new InvalidRequestError("Dealydial must be of type int or string")
+      }
     }
     else {
       params.delayDial = 0
diff --git a/lib/rest/utils.js b/lib/rest/utils.js
index 8a7538c..934836c 100644
--- a/lib/rest/utils.js
+++ b/lib/rest/utils.js
@@ -115,17 +115,7 @@ export function validMultipleDestinationNos(paramName, paramValue, options = {})
 export function validMultipleDestinationIntegers(paramName, paramValue){
   let val = paramValue.split("<");
   for (let i=0; i<val.length; i++){
-    if (!isNaN(val[i]) && Number.isInteger(parseFloat(val[i]))){
-      if(paramName=="delayDial"){
-        if(val[i]!='0'){
-          validRange('DelayDial Destination Value', parseInt(val[i]), false, 1, 120);
-        }
-      }
-      else if (paramName=="ringTimeout"){
-        validRange('RingTimeout Destination Value', parseInt(val[i]), false, 15, 120);
-      }
-    }
-    else{
+    if (!(/^-?\d+$/.test(val[i]))){
       throw new InvalidRequestError( paramName + " Destination value must be integer");
     }
   }