diff --git a/templates/stunnel-client.conf.j2 b/templates/stunnel-client.conf.j2
index ad40776..c5f5f6e 100644
--- a/templates/stunnel-client.conf.j2
+++ b/templates/stunnel-client.conf.j2
@@ -6,6 +6,9 @@ options = SINGLE_ECDH_USE
 options = SINGLE_DH_USE
 {% endif %}
 
+# this means log level = warning
+debug = 4
+
 setuid = stunnel4
 setgid = stunnel4
 pid = /var/run/stunnel4/prometheus-agent.pid