diff --git a/app/templates/app/yo-greeting.html b/app/templates/app/yo-greeting.html
index abbd7f2..e371795 100644
--- a/app/templates/app/yo-greeting.html
+++ b/app/templates/app/yo-greeting.html
@@ -15,8 +15,13 @@ <h1>{{ greeting }}, {{ greeting }}!</h1>
     <input type="text" value="{{ greeting }}">
   </template>
   <script>
-    Polymer({
-      greeting : '\'Allo'
-    });
+    (function () {
+      'use strict';
+
+      Polymer({
+        greeting : '\'Allo'
+      });
+
+    })();
   </script>
 </polymer-element>
diff --git a/app/templates/app/yo-list.html b/app/templates/app/yo-list.html
index 6b094b7..d515ec3 100644
--- a/app/templates/app/yo-list.html
+++ b/app/templates/app/yo-list.html
@@ -17,16 +17,21 @@
     </ul>
   </template>
   <script>
-    Polymer({
-      ready: function() {
-        this.items = [
-          'HTML5 Boilerplate',
-          'Web Component Polyfills',
-          <% if (includeCore) { %>'Core Elements', <% } %>
-          <% if (includePaper) { %>'Paper Elements', <% } %>
-          'Polymer'
-        ];
-      }
-    });
+    (function () {
+      'use strict';
+
+      Polymer({
+        ready: function() {
+          this.items = [
+            'HTML5 Boilerplate',
+            'Web Component Polyfills',
+            <% if (includeCore) { %>'Core Elements', <% } %>
+            <% if (includePaper) { %>'Paper Elements', <% } %>
+            'Polymer'
+          ];
+        }
+      });
+
+    })();
   </script>
 </polymer-element>
diff --git a/el/templates/_element.html b/el/templates/_element.html
index b858863..6d1ab1e 100644
--- a/el/templates/_element.html
+++ b/el/templates/_element.html
@@ -9,8 +9,13 @@
     </style>
   </template>
   <script>
-    Polymer({
+    (function () {
+      'use strict';
 
-    });
+      Polymer({
+        // define element prototype here
+      });
+
+    })();
   </script>
 </polymer-element>