diff --git a/doc/snowflake-client.1 b/doc/snowflake-client.1
index 977fc70..122ada0 100644
--- a/doc/snowflake-client.1
+++ b/doc/snowflake-client.1
@@ -1,4 +1,4 @@
-.TH SNOWFLAKE-CLIENT "1" "June 2021" "snowflake-client" "User Commands"
+.TH SNOWFLAKE-CLIENT "1" "July 2021" "snowflake-client" "User Commands"
 .SH NAME
 snowflake-client \- WebRTC pluggable transport client for Tor
 .SH DESCRIPTION
@@ -7,6 +7,10 @@ connection to volunteer proxies. These proxies relay Tor traffic to a
 Snowflake bridge and then through the Tor network.
 .SS "Usage of snowflake-client:"
 .HP
+\fB\-ampcache\fR string
+.IP
+URL of AMP cache to use as a proxy for signaling
+.HP
 \fB\-front\fR string
 .IP
 front domain