diff --git a/apps/package.json b/apps/package.json
index 2cff88fe6..f5cf7c4f8 100644
--- a/apps/package.json
+++ b/apps/package.json
@@ -22,6 +22,6 @@
     "lazy": "1.0.11",
     "nativescript-dev-typescript": "^0.5.0",
     "tns-platform-declarations": "*",
-    "typescript": "~2.5.1"
+    "typescript": "^2.6.1"
   }
 }
diff --git a/package.json b/package.json
index 391a43358..f6ff1aa26 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "tslint": "^5.4.3",
     "typedoc": "^0.5.10",
     "typedoc-plugin-external-module-name": "git://github.com/PanayotCankov/typedoc-plugin-external-module-name.git#with-js",
-    "typescript": "^2.5.2"
+    "typescript": "^2.6.1"
   },
   "scripts": {
     "setup": "npm run dev-link-tns-platform-declarations && npm run dev-link-tns-core-modules && npm run dev-link-tests && npm run dev-link-apps",
diff --git a/tests/app/fetch/fetch-tests.ts b/tests/app/fetch/fetch-tests.ts
index 9b9e6edc1..b6df4a99e 100644
--- a/tests/app/fetch/fetch-tests.ts
+++ b/tests/app/fetch/fetch-tests.ts
@@ -102,7 +102,7 @@ export var test_fetch_response_headers = function (done) {
 export var test_fetch_headers_sent = function (done) {
     fetch("https://httpbin.org/get", {
         method: "GET",
-        headers: { "Content-Type": "application/json" }
+        headers: new Headers({ "Content-Type": "application/json" }),
     }).then(function (response) {
         var result = response.headers;
         TKUnit.assert(result.get("Content-Type") === "application/json", "Headers not sent/received properly! Actual result is: " + result);
@@ -117,7 +117,7 @@ export var test_fetch_post_form_data = function (done) {
 
     fetch("https://httpbin.org/post", {
         method: "POST",
-        headers: { "Content-Type": "application/x-www-form-urlencoded" },
+        headers: new Headers({ "Content-Type": "application/x-www-form-urlencoded" }),
         body: data
     }).then(r => {
         return r.formData();
@@ -131,7 +131,7 @@ export var test_fetch_post_json = function (done) {
     // >> fetch-post-json
     fetch("https://httpbin.org/post", {
         method: "POST",
-        headers: { "Content-Type": "application/json" },
+        headers: new Headers({ "Content-Type": "application/json" }),
         body: JSON.stringify({ MyVariableOne: "ValueOne", MyVariableTwo: "ValueTwo" })
     }).then(r => { return r.json(); }).then(function (r) {
         // >> (hide)
diff --git a/tests/package.json b/tests/package.json
index a8c3e9da1..075dfe468 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -22,6 +22,6 @@
     "filewalker": "0.1.2",
     "lazy": "1.0.11",
     "tns-platform-declarations": "*",
-    "typescript": "~2.2.1"
+    "typescript": "^2.6.1"
   }
 }
diff --git a/tns-platform-declarations/package.json b/tns-platform-declarations/package.json
index c029827e8..63c3911c3 100644
--- a/tns-platform-declarations/package.json
+++ b/tns-platform-declarations/package.json
@@ -32,6 +32,6 @@
   },
   "homepage": "https://github.com/NativeScript/NativeScript#readme",
   "devDependencies": {
-    "typescript": "~2.2.1"
+    "typescript": "^2.6.1"
   }
 }