diff --git a/src/ts/@overflow/commons/utils/Utils.tsx b/src/ts/@overflow/commons/utils/Utils.tsx
index 8129a91..7187c63 100644
--- a/src/ts/@overflow/commons/utils/Utils.tsx
+++ b/src/ts/@overflow/commons/utils/Utils.tsx
@@ -2,32 +2,32 @@
 
 
 
-export function int2ip(ipInt: number) {
+export function int2ip(ipInt: number): string {
     return ((ipInt >>> 24) + '.' + (ipInt >> 16 & 255) + '.' + (ipInt >> 8 & 255) + '.' + (ipInt & 255));
 }
 
-export function ip2int(ip: string) {
+export function ip2int(ip: string): number {
     return ip.split('.').reduce(function (ipInt, octet) { return (ipInt << 8) + parseInt(octet, 10); }, 0) >>> 0;
 }
 
-export function sec2date(ms: number) {
-    var dateTime = new Date(ms);
+export function sec2date(ms: number): string {
+    let dateTime = new Date(ms);
     return dateTime.toLocaleString();
 }
 
-function numHex(s: number) {
-    var a = s.toString(16);
-    if ((a.length % 2) > 0) { a = "0" + a; }
+function numHex(s: number): string {
+    let a = s.toString(16);
+    if ((a.length % 2) > 0) { a = '0' + a; }
     return a;
 }
 
 export function intToMac(macInt: number): string {
 
-    var hexValue = numHex(macInt);
+    let hexValue = numHex(macInt);
 
-    var macaddress = [];
+    let macaddress = [];
 
-    for (var i = 0; i < hexValue.length; i = i + 2) {
+    for (let i = 0; i < hexValue.length; i = i + 2) {
         macaddress.push(hexValue.substr(i, 2));
     }