diff --git a/roles/copr/backend/templates/lighttpd/lighttpd_dev.conf b/roles/copr/backend/templates/lighttpd/lighttpd_dev.conf
index ab355b0629..1c9c855f58 100644
--- a/roles/copr/backend/templates/lighttpd/lighttpd_dev.conf
+++ b/roles/copr/backend/templates/lighttpd/lighttpd_dev.conf
@@ -460,7 +460,7 @@ $HTTP["url"] =~ "^/.well-known/" {
 # Enable HTTPS
 $SERVER["socket"] == ":443" {
     ssl.engine              = "enable"
-{% for hostname, _ in letsencrypt.certificates.iteritems()  %}
+{% for hostname, _ in letsencrypt.certificates.items()  %}
     ssl.ca-file             = "/etc/letsencrypt/live/{{ hostname }}/chain.pem"
     ssl.pemfile             = "/etc/letsencrypt/live/{{ hostname }}/combined.pem"
 {% endfor %}