diff --git a/doc/h2load.1 b/doc/h2load.1
index f6e39701..6e34d8ca 100644
--- a/doc/h2load.1
+++ b/doc/h2load.1
@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "H2LOAD" "1" "May 21, 2017" "1.23.0-DEV" "nghttp2"
+.TH "H2LOAD" "1" "May 26, 2017" "1.23.0" "nghttp2"
 .SH NAME
 h2load \- HTTP/2 benchmarking tool
 .
diff --git a/doc/nghttp.1 b/doc/nghttp.1
index 613c6fa3..04392e07 100644
--- a/doc/nghttp.1
+++ b/doc/nghttp.1
@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "NGHTTP" "1" "May 21, 2017" "1.23.0-DEV" "nghttp2"
+.TH "NGHTTP" "1" "May 26, 2017" "1.23.0" "nghttp2"
 .SH NAME
 nghttp \- HTTP/2 client
 .
diff --git a/doc/nghttpd.1 b/doc/nghttpd.1
index e9f029ed..0a8366d2 100644
--- a/doc/nghttpd.1
+++ b/doc/nghttpd.1
@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "NGHTTPD" "1" "May 21, 2017" "1.23.0-DEV" "nghttp2"
+.TH "NGHTTPD" "1" "May 26, 2017" "1.23.0" "nghttp2"
 .SH NAME
 nghttpd \- HTTP/2 server
 .
diff --git a/doc/nghttpx.1 b/doc/nghttpx.1
index 3a103782..273474de 100644
--- a/doc/nghttpx.1
+++ b/doc/nghttpx.1
@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "NGHTTPX" "1" "May 21, 2017" "1.23.0-DEV" "nghttp2"
+.TH "NGHTTPX" "1" "May 26, 2017" "1.23.0" "nghttp2"
 .SH NAME
 nghttpx \- HTTP/2 proxy
 .
@@ -833,6 +833,11 @@ connections.
 .UNINDENT
 .INDENT 0.0
 .TP
+.B \-\-no\-verify\-ocsp
+nghttpx does not verify OCSP response.
+.UNINDENT
+.INDENT 0.0
+.TP
 .B \-\-no\-ocsp
 Disable OCSP stapling.
 .UNINDENT
@@ -1751,6 +1756,22 @@ be customized using \fI\%\-\-fetch\-ocsp\-response\-file\fP option.
 .sp
 If OCSP query is failed, previous OCSP response, if any, is continued
 to be used.
+.sp
+\fI\%\-\-fetch\-ocsp\-response\-file\fP option provides wide range of
+possibility to manage OCSP response.  It can take an arbitrary script
+or executable.  The requirement is that it supports the command\-line
+interface of \fBfetch\-ocsp\-response\fP script, and it must return a
+valid DER encoded OCSP response on success.  It must return exit code
+0 on success, and 75 for temporary error, and the other error code for
+generic failure.  For large cluster of servers, it is not efficient
+for each server to perform OCSP query using \fBfetch\-ocsp\-response\fP\&.
+Instead, you can retrieve OCSP response in some way, and store it in a
+disk or a shared database.  Then specify a program in
+\fI\%\-\-fetch\-ocsp\-response\-file\fP to fetch it from those stores.
+This could provide a way to share the OCSP response between fleet of
+servers, and also any OCSP query strategy can be applied which may be
+beyond the ability of nghttpx itself or \fBfetch\-ocsp\-response\fP
+script.
 .SH TLS SESSION RESUMPTION
 .sp
 nghttpx supports TLS session resumption through both session ID and
diff --git a/doc/nghttpx.1.rst b/doc/nghttpx.1.rst
index 0f04c938..97af6938 100644
--- a/doc/nghttpx.1.rst
+++ b/doc/nghttpx.1.rst
@@ -763,6 +763,10 @@ SSL/TLS
     responses   must    be   available    before   accepting
     connections.
 
+.. option:: --no-verify-ocsp
+
+    nghttpx does not verify OCSP response.
+
 .. option:: --no-ocsp
 
     Disable OCSP stapling.
@@ -1601,6 +1605,22 @@ be customized using :option:`--fetch-ocsp-response-file` option.
 If OCSP query is failed, previous OCSP response, if any, is continued
 to be used.
 
+:option:`--fetch-ocsp-response-file` option provides wide range of
+possibility to manage OCSP response.  It can take an arbitrary script
+or executable.  The requirement is that it supports the command-line
+interface of ``fetch-ocsp-response`` script, and it must return a
+valid DER encoded OCSP response on success.  It must return exit code
+0 on success, and 75 for temporary error, and the other error code for
+generic failure.  For large cluster of servers, it is not efficient
+for each server to perform OCSP query using ``fetch-ocsp-response``.
+Instead, you can retrieve OCSP response in some way, and store it in a
+disk or a shared database.  Then specify a program in
+:option:`--fetch-ocsp-response-file` to fetch it from those stores.
+This could provide a way to share the OCSP response between fleet of
+servers, and also any OCSP query strategy can be applied which may be
+beyond the ability of nghttpx itself or ``fetch-ocsp-response``
+script.
+
 TLS SESSION RESUMPTION
 ----------------------