diff --git a/systemd/doh-client.service b/systemd/doh-client.service
index e339969..4d73c93 100644
--- a/systemd/doh-client.service
+++ b/systemd/doh-client.service
@@ -1,5 +1,6 @@
 [Unit]
 Description=DNS-over-HTTPS Client
+Documentation=https://github.com/m13253/dns-over-https
 After=network.target
 Before=nss-lookup.target
 Wants=nss-lookup.target
diff --git a/systemd/doh-server.service b/systemd/doh-server.service
index e04c8d5..987ea6d 100644
--- a/systemd/doh-server.service
+++ b/systemd/doh-server.service
@@ -1,5 +1,6 @@
 [Unit]
 Description=DNS-over-HTTPS Server
+Documentation=https://github.com/m13253/dns-over-https
 After=network.target
 
 [Service]