diff --git a/unit/biboumi.service.cmake b/unit/biboumi.service.cmake
index 1cdf4e1..150045b 100644
--- a/unit/biboumi.service.cmake
+++ b/unit/biboumi.service.cmake
@@ -1,6 +1,6 @@
 [Unit]
 Description=Biboumi, XMPP to IRC gateway
-Documentation=man:biboumi(1) http://biboumi.louiz.org
+Documentation=man:biboumi(1) https://biboumi.louiz.org
 After=network.target
 
 [Service]