diff --git a/index.html b/index.html
index 5633f29..21526bc 100644
--- a/index.html
+++ b/index.html
@@ -167,7 +167,9 @@
                     </button>
                 </div>
                 <div class="modal-body">
-                    <iframe width="100%" height="480" src="" frameborder="0" allowfullscreen></iframe>
+                    <div class="embed-responsive embed-responsive-16by9">
+                        <iframe class="embed-responsive-item" src="" allowfullscreen></iframe>
+                    </div>
                     <hr>
                     <p></p>
                 </div>
@@ -184,7 +186,9 @@
                     </button>
                 </div>
                 <div class="modal-body">
-                    <iframe width="100%" height="480" src="" frameborder="0" allowfullscreen></iframe>
+                    <div class="embed-responsive embed-responsive-16by9">
+                        <iframe class="embed-responsive-item" src="" allowfullscreen></iframe>
+                    </div>
                     <hr>
                     <p></p>
                 </div>