derekovecs: upgrade external js libraries
diff --git a/templates/index.html.ep b/templates/index.html.ep
index 03944b7..13a56a1 100644
--- a/templates/index.html.ep
+++ b/templates/index.html.ep
@@ -6,11 +6,11 @@
     <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
     <link href="https://fonts.googleapis.com/css?family=Lato|Roboto+Condensed" rel="stylesheet">
     <script src="http://code.jquery.com/jquery-latest.min.js"></script>
-    <script src = "https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js"></script>
-    <script src = "https://cdn.datatables.net/fixedcolumns/3.2.3/js/dataTables.fixedColumns.min.js"></script>
-    <script src = "https://cdn.datatables.net/plug-ins/1.10.16/sorting/scientific.js"></script>
-    <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-MML-AM_CHTML'></script>
-    <link rel="stylesheet" href="https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css">
+    <script src = "https://cdn.datatables.net/1.10.18/js/jquery.dataTables.min.js"></script>
+    <script src = "https://cdn.datatables.net/fixedcolumns/3.2.5/js/dataTables.fixedColumns.min.js"></script>
+    <script src = "https://cdn.datatables.net/plug-ins/1.10.18/sorting/scientific.js"></script>
+    <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML'></script>
+    <link rel="stylesheet" href="https://cdn.datatables.net/1.10.18/css/jquery.dataTables.min.css">
     <link rel="stylesheet" href="/derekovecs/css/derekovecs.css">
     <script
       src="http://code.jquery.com/ui/1.12.1/jquery-ui.min.js"