diff --git a/ArithmeticServer.js b/ArithmeticServer.ts
similarity index 95%
rename from ArithmeticServer.js
rename to ArithmeticServer.ts
index 764039b..0ea4c17 100644
--- a/ArithmeticServer.js
+++ b/ArithmeticServer.ts
@@ -18,9 +18,9 @@ http.createServer(function (request, response) {
             ans = 'num must be used with fibonacci pathname!';
         }
         else {
-            n = parseInt(queryData.num);
+            let n:number = parseInt(queryData.num);
             if (n < 0) {
-                ans = 'no fibonacci response for negative values, num =' + num;
+                ans = 'no fibonacci response for negative values, num =' + queryData.num;
             }
             else {
                 ans = fibonaci(n);
@@ -67,11 +67,11 @@ http.createServer(function (request, response) {
 console.log('running - listening on port ', port);
 
 
-function fibonaci(n) {
+function fibonaci(n:number) {
     if ((1 == n) || (0 == n) )  {
         return 1;
     }
     else {
         return (fibonaci(n-1) + fibonaci(n-2));
     }
-}
\ No newline at end of file
+}
diff --git a/Fibo1.js b/Fibo1.ts
similarity index 87%
rename from Fibo1.js
rename to Fibo1.ts
index 6cba7e8..47a0676 100644
--- a/Fibo1.js
+++ b/Fibo1.ts
@@ -1,7 +1,7 @@
 /**
  * Created by User on 3/17/14.
  */
-function fibonaci(n) {
+function fibonaci(n:number) {
     if ((1 == n) || (0 == n) )  {
         return 1;
     }
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..fe827cd
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,19 @@
+{
+  "name": "lesson02",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
+      "version": "12.7.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.7.2.tgz",
+      "integrity": "sha512-dyYO+f6ihZEtNPDcWNR1fkoTDf3zAK3lAABDze3mz6POyIercH0lEUawUFXlG8xaQZmm1yEBON/4TsYv/laDYg==",
+      "dev": true
+    },
+    "typescript": {
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.5.3.tgz",
+      "integrity": "sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..fbaa976
--- /dev/null
+++ b/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "lesson02",
+  "version": "1.0.0",
+  "description": "lesson02 ========",
+  "main": "ArithmeticServer.js",
+  "dependencies": {
+    "typescript": "^3.5.3"
+  },
+  "devDependencies": {
+    "@types/node": "^12.7.2"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Ilantc",
+  "license": "ISC"
+}
diff --git a/polyn.js b/polyn.ts
similarity index 91%
rename from polyn.js
rename to polyn.ts
index 12e1d8a..8493a28 100644
--- a/polyn.js
+++ b/polyn.ts
@@ -1,7 +1,7 @@
 /**
  * Created by User on 3/17/14.
  */
-function isPolyndrom(a) {
+function isPolyndrom(a:string) {
     for(var i = 0, j =a.length-1 ; i < j ; i++,j--){
        if (a.charAt(i) != a.charAt(j)) {
            return false;