diff --git a/init/README.md b/init/README.md
index d26328b..dbeec70 100644
--- a/init/README.md
+++ b/init/README.md
@@ -62,7 +62,7 @@ To keep our unit files tidy, we haven't littered them with comments. So here we
 - **`After=network.target network-online.target`** and **`Requires=network-online.target`** ensures that the network interfaces are online before Caddy starts. This is necessary because Caddy uses the network to obtain certificates and serve your site over TLS. Specifically, `network-online.target` is needed for the many users who bind listeners to specific network interfaces.
 - **`TimeoutStopSec=5s`** will forcibly kill the caddy process if it cannot gracefully shut down within this time limit. We figure, if you're stopping the server anyway (as opposed to reloading -- two very distinct operations!) then stopping gracefully is less important than stopping at all.
 - **`LimitNOFILE=1048576`** raises the file descriptor limit for the caddy process (`ulimit -n`). This is very important for busy sites, or for servers which need to keep connections open longer. This is the [maximum allowed value](https://stackoverflow.com/a/1213069/1048862) for some popular Linux distros.
-- **`LimitNPROC=512`** raises the number of threads caddy is allowed to have (`ulimit -u`). Obviously, setting this too low for a highly concurrent server is a bad idea.
+- **`TasksMax=512`** raises the number of threads caddy is allowed to have (`ulimit -u`). Obviously, setting this too low for a highly concurrent server is a bad idea.
 - **`PrivateTmp=true`** keeps /tmp and /var/tmp private, which are discarded after caddy stops.
 - **`ProtectSystem=full`** allows writing to /var, which is crucial so that it can store certificates and other data for your site.
 - **`AmbientCapabilities=CAP_NET_ADMIN CAP_NET_BIND_SERVICE`** allows caddy to modify socket options and bind to low ports (< 1024) without running as root.
diff --git a/init/caddy-api.service b/init/caddy-api.service
index ce32ff6..6c8a0f1 100644
--- a/init/caddy-api.service
+++ b/init/caddy-api.service
@@ -20,6 +20,7 @@ Group=caddy
 ExecStart=/usr/bin/caddy run --environ --resume
 TimeoutStopSec=5s
 LimitNOFILE=1048576
+TasksMax=512
 PrivateTmp=true
 ProtectSystem=full
 AmbientCapabilities=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
diff --git a/init/caddy.service b/init/caddy.service
index 1292e12..30ca048 100644
--- a/init/caddy.service
+++ b/init/caddy.service
@@ -27,6 +27,7 @@ ExecStart=/usr/bin/caddy run --environ --config /etc/caddy/Caddyfile
 ExecReload=/usr/bin/caddy reload --config /etc/caddy/Caddyfile --force
 TimeoutStopSec=5s
 LimitNOFILE=1048576
+TasksMax=512
 PrivateTmp=true
 ProtectSystem=full
 AmbientCapabilities=CAP_NET_ADMIN CAP_NET_BIND_SERVICE