Shared SSL session cache
diff --git a/nginx/files/_ssl.conf b/nginx/files/_ssl.conf
index 72fde47..2288c3f 100644
--- a/nginx/files/_ssl.conf
+++ b/nginx/files/_ssl.conf
@@ -2,6 +2,8 @@
   {%- if site.get('ssl', {'enabled': False}).get('enabled', False) %}
   ssi on;
   ssl on;
+  ssl_session_cache shared:SSL:10m;
+  ssl_session_timeout  10m;
   ssl_certificate /etc/ssl/certs/{{ site.host.name }}-with-chain.crt;
   ssl_certificate_key /etc/ssl/private/{{ site.host.name }}.key;
   {%- set ssl_mode = site.ssl.get('mode', 'secure') %}