diff --git a/src/administrators-guide/src/docbkx/content/general.xml b/src/administrators-guide/src/docbkx/content/general.xml
index 66c44b3..044516e 100644
--- a/src/administrators-guide/src/docbkx/content/general.xml
+++ b/src/administrators-guide/src/docbkx/content/general.xml
@@ -92,7 +92,7 @@
                 </itemizedlist>
             </para>
             <para>
-                The list of OSes which we used in our lab is shown below.
+                The list of OSes which can be used for a lab shown below:
             </para>
             <table xml:id="_software_requirements" frame="all">
                 <title>OS Requirements</title>
@@ -107,6 +107,9 @@
                         <row>
                             <entry>Ubuntu Server 12.04 LTS</entry>
                         </row>
+                        <row>
+                            <entry>Centos 6.4</entry>
+                        </row>
                     </tbody>
                 </tgroup>
             </table>
diff --git a/src/administrators-guide/src/docbkx/content/installation-guide.xml b/src/administrators-guide/src/docbkx/content/installation-guide.xml
index 0a2139f..5844b89 100644
--- a/src/administrators-guide/src/docbkx/content/installation-guide.xml
+++ b/src/administrators-guide/src/docbkx/content/installation-guide.xml
@@ -23,9 +23,10 @@
                           http://www.w3.org/1999/xlink http://www.w3.org/1999/xlink.xsd"
          version="5.0">
     <title>Install Murano Components</title>
-    <para>This chapter describes how to install Murano components on a separate devbox. 
-    We strongly recommend to use a separate host (virtual machine or real host) for Murano 
-    devbox as it prevents you from various dependency conflicts.
+    <para>This chapter describes how to install Murano components on a
+        separate devbox. We strongly recommend to use a separate host (virtual machine or real
+        host) for Murano devbox as it prevents you from various dependency conflicts.
+        You can refer <link xlink:href="https://wiki.openstack.org/wiki/Murano/Requirements"> this link</link> to check supported version of all Murano dependencies.
     </para>
     <section>
         <title>Automatic Installation</title>