Unbreak building of the iperf3 Web site.
diff --git a/docs/_esnet/templates/layout.html b/docs/_esnet/templates/layout.html
index f43cb44..b7df31b 100644
--- a/docs/_esnet/templates/layout.html
+++ b/docs/_esnet/templates/layout.html
@@ -2,7 +2,7 @@
{% set theme_css_files = [] %}
{% if theme_bootstrap_version == "3" %}
- {% set bootstrap_version, bootstrap_additional_css, navbar_version = "3.1.0", "theme", "" %}
+ {% set bootstrap_version, bootstrap_additional_css, navbar_version = "3.3.6", "theme", "" %}
{% set bs_span_prefix = "col-md-" %}
{% else %}
{% set bootstrap_version, bootstrap_additional_css, navbar_version = "2.3.2", "responsive", "-2" %}