diff --git a/src/output.c b/src/output.c
index bc20d18..2d7f28d 100644
--- a/src/output.c
+++ b/src/output.c
@@ -628,8 +628,8 @@ static void html_header(struct conf_t *state, FILE *restrict f)
 	fprintf(f, "<meta charset=\"utf-8\">\n");
 	fprintf(f, "<meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n");
 	fprintf(f, "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n");
-	fprintf(f, "<link rel=\"stylesheet\" href=\"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css\" type=\"text/css\">\n");
-	fprintf(f, "<link rel=\"stylesheet\" type=\"text/css\" href=\"https://cdn.datatables.net/v/bs/jq-3.2.1/dt-1.10.16/datatables.min.css\">\n");
+	fprintf(f, "<link rel=\"stylesheet\" href=\"https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css\" type=\"text/css\">\n");
+	fprintf(f, "<link rel=\"stylesheet\" type=\"text/css\" href=\"https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css\">\n");
 	fprintf(f, "<style type=\"text/css\">\n");
 	fprintf(f, "table.dhcpd-pools th { text-transform: capitalize }\n");
 	fprintf(f, "</style>\n");
@@ -652,7 +652,7 @@ static void html_footer(FILE *restrict f)
 	fprintf(f, "<small>Generated using %s<br />\n", PACKAGE_STRING);
 	fprintf(f, "More info at <a href=\"%s\">%s</a>\n", PACKAGE_URL, PACKAGE_URL);
 	fprintf(f, "</small></div></div>\n");
-	fprintf(f, "<script src=\"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js\" type=\"text/javascript\"></script>\n");
+	fprintf(f, "<script src=\"https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js\" type=\"text/javascript\"></script>\n");
 	fprintf(f, "<script type=\"text/javascript\" src=\"https://cdn.datatables.net/v/bs/jq-3.2.1/dt-1.10.16/datatables.min.js\"></script>\n");
 	fprintf(f, "<script type=\"text/javascript\" class=\"init\">$(document).ready(function() { $('#s').DataTable({ \"iDisplayLength\": 50, \"lengthMenu\": [ [25, 50, 100, -1], [25, 50, 100, \"All\"] ], \"order\": [[ 4, \"desc\" ]] } ); } );</script>\n");
 	fprintf(f, "<script type=\"text/javascript\" class=\"init\">$(document).ready(function() { $('#r').DataTable({ \"iDisplayLength\": 100, \"lengthMenu\": [ [25, 50, 100, -1], [25, 50, 100, \"All\"] ], \"order\": [[ 6, \"desc\" ]] } ); } );</script>\n");
diff --git a/tests/expected/formats b/tests/expected/formats
index 6aa6432..9008b93 100644
--- a/tests/expected/formats
+++ b/tests/expected/formats
@@ -23,8 +23,8 @@ All networks           100    43     43.000       0     43    43.000
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
-<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" type="text/css">
-<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/v/bs/jq-3.2.1/dt-1.10.16/datatables.min.css">
+<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" type="text/css">
+<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css">
 <style type="text/css">
 table.dhcpd-pools th { text-transform: capitalize }
 </style>
@@ -178,7 +178,7 @@ table.dhcpd-pools th { text-transform: capitalize }
 <br /><div class="well well-lg">
 More info at <a href="http://dhcpd-pools.sourceforge.net/">http://dhcpd-pools.sourceforge.net/</a>
 </small></div></div>
-<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" type="text/javascript"></script>
+<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" type="text/javascript"></script>
 <script type="text/javascript" src="https://cdn.datatables.net/v/bs/jq-3.2.1/dt-1.10.16/datatables.min.js"></script>
 <script type="text/javascript" class="init">$(document).ready(function() { $('#s').DataTable({ "iDisplayLength": 50, "lengthMenu": [ [25, 50, 100, -1], [25, 50, 100, "All"] ], "order": [[ 4, "desc" ]] } ); } );</script>
 <script type="text/javascript" class="init">$(document).ready(function() { $('#r').DataTable({ "iDisplayLength": 100, "lengthMenu": [ [25, 50, 100, -1], [25, 50, 100, "All"] ], "order": [[ 6, "desc" ]] } ); } );</script>