diff --git a/README.rst b/README.rst
index fb40ac55..a0516cc5 100644
--- a/README.rst
+++ b/README.rst
@@ -101,7 +101,8 @@ To mitigate heap fragmentation in long running server programs
      Alpine Linux currently does not support malloc replacement
      due to musl limitations. See details in issue `#762 <https://github.com/nghttp2/nghttp2/issues/762>`_.
 
-libnghttp2_asio C++ library (deprecated) requires the following
+libnghttp2_asio C++ library (deprecated, has moved to
+https://github.com/nghttp2/nghttp2-asio) requires the following
 packages:
 
 * libboost-dev >= 1.54.0
@@ -1430,7 +1431,8 @@ corresponding header set was processed.  The format is the same as
 libnghttp2_asio: High level HTTP/2 C++ library
 ----------------------------------------------
 
-libnghttp2_asio has been deprecated.
+libnghttp2_asio has been deprecated, and moved to
+https://github.com/nghttp2/nghttp2-asio.
 
 libnghttp2_asio is C++ library built on top of libnghttp2 and provides
 high level abstraction API to build HTTP/2 applications.  It depends
diff --git a/doc/sources/libnghttp2_asio.rst b/doc/sources/libnghttp2_asio.rst
index 8e9fd04d..3e3d44a6 100644
--- a/doc/sources/libnghttp2_asio.rst
+++ b/doc/sources/libnghttp2_asio.rst
@@ -3,8 +3,9 @@ libnghttp2_asio: High level HTTP/2 C++ library
 
 .. warning::
 
-    libnghttp2_asio has been deprecated due to maintenance issue.  It
-    will not get any updates.  It will be removed at the end of 2022.
+    libnghttp2_asio has been deprecated in this repository due to
+    maintenance issue and will be removed at the end of 2022.  It has
+    moved to https://github.com/nghttp2/nghttp2-asio.
 
 libnghttp2_asio is C++ library built on top of libnghttp2 and provides
 high level abstraction API to build HTTP/2 applications.  It depends