diff --git a/sandbox.html b/sandbox.html
index e0dd43b..440af05 100644
--- a/sandbox.html
+++ b/sandbox.html
@@ -3,8 +3,8 @@
   <head>
     <meta charset="utf-8">
     <title>Developer's Sandbox</title>
-    <script src="https://code.jquery.com/jquery-3.2.1.min.js" />
-    <script src="./sandbox/helloajax.js" type="text/javascript" />
+    <script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
+    <script src="./sandbox/helloajax.js" type="text/javascript"></script>
   </head>
   <body>
     <nav>
