diff --git a/angular-textfill.js b/angular-textfill.js
index 975c591..74e1c03 100644
--- a/angular-textfill.js
+++ b/angular-textfill.js
@@ -1,7 +1,13 @@
-'use strict'
+(function() {
+  'use strict';
 
-angular.module('ngTextFill', [])
-  .directive('textfill', ['$timeout', function ($timeout) {
+  angular
+    .module('ngTextFill', [])
+    .directive('textfill', textfillDirective);
+
+  textfillDirective.$inject = ['$timeout'];
+
+  function textfillDirective($timeout) {
     return {
       restrict: 'A',
       scope: {
@@ -11,26 +17,31 @@ angular.module('ngTextFill', [])
         textfillOnComplete: '='
       },
       template: '<span>{{textfill}}</span>',
-      link: function (scope, element, attr) {
-        var container = element,
-            options = {
-              innerTag: attr.innerTag || "span",
-              debug: attr.debug || false,
-              minFontPixels: parseInt(attr.minFontPixels) || 4,
-              maxFontPixels: parseInt(attr.maxFontPixels) || 40,
-              widthOnly: attr.widthOnly || false,
-              explicitHeight: attr.explicitHeight || null,
-              explicitWidth: attr.explicitWidth || null,
-              success: scope.textfillOnSuccess || null,
-              fail: scope.textfillOnFail || null,
-              complete: scope.textfillOnComplete || null
-            };
+      link: link
+    };
 
+    function link(scope, element, attr) {
+      var container = element;
+      var options = {
+        innerTag: attr.innerTag || "span",
+        debug: attr.debug || false,
+        minFontPixels: parseInt(attr.minFontPixels, 10) || 4,
+        maxFontPixels: parseInt(attr.maxFontPixels, 10) || 40,
+        widthOnly: attr.widthOnly || false,
+        explicitHeight: attr.explicitHeight || null,
+        explicitWidth: attr.explicitWidth || null,
+        success: scope.textfillOnSuccess || null,
+        fail: scope.textfillOnFail || null,
+        complete: scope.textfillOnComplete || null
+      };
+
+      $timeout(function() {
         container.textfill(options);
+      });
 
-        scope.$watch('textfill', function () {
-          container.textfill(options);
-        });
-      }
-    };
-  }]);
+      scope.$watch('textfill', function () {
+        container.textfill(options);
+      });
+    }
+  }
+})(window, window.angular);
diff --git a/bower.json b/bower.json
index 40b7eef..ef64b01 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "angular-textfill",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "authors": [
     "Henning Morud <h.morud@sportradar.com>"
   ],