diff --git a/docs/honk.8 b/docs/honk.8
index 1166a18..4e23cdb 100644
--- a/docs/honk.8
+++ b/docs/honk.8
@@ -32,6 +32,7 @@ Set up a TLS reverse proxy.
 .Nm
 can listen on TCP or unix sockets, but will not terminate TLS.
 https is a required component for federation.
+Also, http signature verification requires accurate time keeping.
 .Pp
 Make sure to pass the Host header, if necessary (as for nginx).
 .Bd -literal -offset indent