diff --git a/squid/files/whitelist-evolinux.conf b/squid/files/whitelist-evolinux.conf
index 30c5140e..eb0dfd27 100644
--- a/squid/files/whitelist-evolinux.conf
+++ b/squid/files/whitelist-evolinux.conf
@@ -10,6 +10,9 @@ http://spamassassin.apache.org/.*
 http://.*sa-update.*
 http://pear.php.net/.*
 
+# Let's Encrypt
+http://ocsp.int-x3.letsencrypt.org/.*
+
 ### CMS / Wordpress / Drupal / ...
 # Wordpress
 http://.*akismet.com/.*