diff --git a/conf/systemd/frpc.service b/conf/systemd/frpc.service
index 61adb3c0..37a6a9bc 100644
--- a/conf/systemd/frpc.service
+++ b/conf/systemd/frpc.service
@@ -9,9 +9,6 @@ Restart=on-failure
 RestartSec=5s
 ExecStart=/usr/bin/frpc -c /etc/frp/frpc.ini
 ExecReload=/usr/bin/frpc reload -c /etc/frp/frpc.ini
-# see:
-#   https://github.com/containerd/containerd/issues/3201
-#   https://github.com/containerd/containerd/pull/3202
 LimitNOFILE=1048576
 
 [Install]
diff --git a/conf/systemd/frps.service b/conf/systemd/frps.service
index 20c11756..c00f2dc5 100644
--- a/conf/systemd/frps.service
+++ b/conf/systemd/frps.service
@@ -8,9 +8,6 @@ User=nobody
 Restart=on-failure
 RestartSec=5s
 ExecStart=/usr/bin/frps -c /etc/frp/frps.ini
-# see:
-#   https://github.com/containerd/containerd/issues/3201
-#   https://github.com/containerd/containerd/pull/3202
 LimitNOFILE=1048576
 
 [Install]