diff --git a/README.rst b/README.rst
index 9b0a386..c8a2967 100644
--- a/README.rst
+++ b/README.rst
@@ -16,7 +16,7 @@ develop to decode the following messages:
       heading, and roll angle, etc.
 
 A detailed manuel on Mode-S decoding is published by the author, at:  
-http://adsb-decode-guide.readthedocs.org
+http://adsb-decode-guide.readthedocs.io
 
 
 Source code
@@ -24,6 +24,8 @@ Source code
 Checkourt and contribute to this open source project at:   
 https://github.com/junzis/pyModeS
 
+API documentation at:   
+http://pymodes.readthedocs.io
 
 Install
 -------
diff --git a/doc/index.rst b/doc/index.rst
index d1e21c3..e05f04f 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -4,9 +4,13 @@
    contain the root `toctree` directive.
 
 
-pyModeS API documents
+pyModeS APIs
 =====================
 
+This document contains all the functions within pyModeS package. 
+
+Source code and user guide: https://github.com/junzis/pyModeS
+
 
 pyModeS.adsb module
 -------------------