diff --git a/contrib/init/systemd/docker.service b/contrib/init/systemd/docker.service
index 0c414c275b..5683409328 100644
--- a/contrib/init/systemd/docker.service
+++ b/contrib/init/systemd/docker.service
@@ -23,5 +23,9 @@ LimitNOFILE=infinity
 LimitNPROC=infinity
 LimitCORE=infinity
 
+# Comment TasksMax if your systemd version does not supports it.
+# Only systemd 226 and above support this option.
+TasksMax=infinity
+
 [Install]
 WantedBy=multi-user.target