diff --git a/build/tslint.json b/build/tslint.json
index 69800f58b..b5318e628 100644
--- a/build/tslint.json
+++ b/build/tslint.json
@@ -10,7 +10,6 @@
         "no-consecutive-blank-lines": true,
         "no-construct": true,
         "no-debugger": true,
-        "no-duplicate-key": true,
         "triple-equals": [true, "allow-null-check"],
         "variable-name": [false, "allow-leading-underscore"],
         "no-empty": true,
@@ -21,7 +20,6 @@
         "no-bitwise": false,
         "no-string-literal": false,
         "no-trailing-whitespace": false,
-        "no-unreachable": false,
         "no-unused-expression": true,
         "no-use-before-declare": false,
         "no-var-requires": false,
@@ -47,10 +45,6 @@
             "catchClause",
             "indexSignature"
         ],
-        "use-strict": [false,
-            "check-module",
-            "check-function"
-        ],
         "whitespace": [false,
             "check-branch",
             "check-decl",
diff --git a/package.json b/package.json
index e2778da42..94eedda69 100644
--- a/package.json
+++ b/package.json
@@ -10,17 +10,17 @@
   "devDependencies": {
     "chai": "3.2.0",
     "concurrently": "^2.1.0",
-    "grunt": "0.4.5",
-    "grunt-contrib-clean": "0.6.0",
-    "grunt-contrib-copy": "git+https://github.com/ErjanGavalji/grunt-contrib-copy.git#1c976a133210be4ce8c96313f5daf14833f7f8f9",
+    "grunt": "1.0.1",
+    "grunt-contrib-clean": "1.0.0",
+    "grunt-contrib-copy": "git+https://github.com/NativeScript/grunt-contrib-copy.git#master",
     "grunt-env": "0.4.4",
-    "grunt-exec": "0.4.6",
-    "grunt-mkdir": "0.1.2",
+    "grunt-exec": "1.0.1",
+    "grunt-mkdir": "1.0.0",
     "grunt-multi-dest": "1.0.0",
-    "grunt-shell": "1.1.2",
-    "grunt-simple-mocha": "0.4.0",
+    "grunt-shell": "2.1.0",
+    "grunt-simple-mocha": "0.4.1",
     "grunt-ts": "5.3.2",
-    "grunt-tslint": "3.0.3",
+    "grunt-tslint": "4.0.0",
     "grunt-typedoc": "0.2.4",
     "grunt-untar": "0.0.1",
     "http-server": "^0.9.0",
@@ -29,7 +29,7 @@
     "nativescript-typedoc-theme": "0.0.7",
     "shelljs": "^0.7.0",
     "time-grunt": "1.3.0",
-    "tslint": "^3.15.1",
+    "tslint": "^4.4.2",
     "typedoc": "0.4.5",
     "typescript": "~2.0.10"
   },
diff --git a/tns-core-modules/ui/tab-view/tab-view.ios.ts b/tns-core-modules/ui/tab-view/tab-view.ios.ts
index df401071f..f84322fe1 100644
--- a/tns-core-modules/ui/tab-view/tab-view.ios.ts
+++ b/tns-core-modules/ui/tab-view/tab-view.ios.ts
@@ -499,7 +499,7 @@ export class TabViewStyler implements style.Styler {
         var tabBar = <UITabBar>v.ios.tabBar;
         let currentFont;
 
-        if (tabBar.items.count > 0) {
+        if (tabBar.items && tabBar.items.count > 0) {
             let currentAttrs = tabBar.items[0].titleTextAttributesForState(UIControlState.Normal);
             if (currentAttrs) {
                 currentFont = currentAttrs.objectForKey(NSFontAttributeName);
@@ -595,4 +595,4 @@ export class TabViewStyler implements style.Styler {
     }
 }
 
-TabViewStyler.registerHandlers();
\ No newline at end of file
+TabViewStyler.registerHandlers();