diff --git a/cap2site.1 b/cap2site.1
index 5e08f78..7e5ba11 100644
--- a/cap2site.1
+++ b/cap2site.1
@@ -144,7 +144,7 @@ cap2site \- Convert a Gemini capsule to a HTML site
 .IX Header "SYNOPSIS"
 cap2site [flags] < \s-1INPUT\s0.gmi > \s-1OUTPUT\s0.html
 .PP
-.Vb 7
+.Vb 8
 \&  Options:
 \&    \-help              brief help message
 \&    \-hh                full help message
@@ -152,6 +152,7 @@ cap2site [flags] < \s-1INPUT\s0.gmi > \s-1OUTPUT\s0.html
 \&    \-(no)\-inline\-video include video in site
 \&    \-(no)\-inline\-image include images in site
 \&    \-standalone        include data for headers
+\&    \-replace\-domain    replace a Gemini domain with another (possibly non\-gemini) domain
 .Ve
 .SH "OPTIONS"
 .IX Header "OPTIONS"
@@ -164,3 +165,6 @@ Include the respective asset types inline
 .IP "\fB\-(no)\-standalone\fR" 4
 .IX Item "-(no)-standalone"
 Include header and body tags
+.IP "\fB\-replace\-domain old=new\fR" 4
+.IX Item "-replace-domain old=new"
+Replace all Gemini domains at path old with ones based on new
diff --git a/cap2site.pl b/cap2site.pl
index 900d31b..6598449 100755
--- a/cap2site.pl
+++ b/cap2site.pl
@@ -249,6 +249,7 @@ cap2site [flags] < INPUT.gmi > OUTPUT.html
     -(no)-inline-video include video in site
     -(no)-inline-image include images in site
     -standalone        include data for headers
+    -replace-domain    replace a Gemini domain with another (possibly non-gemini) domain
 
 =head1 OPTIONS
 
@@ -266,6 +267,10 @@ Include the respective asset types inline
 
 Include header and body tags
 
+=item B<-replace-domain old=new>
+
+Replace all Gemini domains at path old with ones based on new
+
 =back
 
 =cut