Java plugin upgrade in Oracle EBS R12.1.3

Hi Team,

I need to upgrade java plugin on my EBS R12.1.3 environment. please find the version as belows

[appltest@derp ~]$ grep plugin $CONTEXT_FILE

         <!-- JDK plugins -->

         <sun_plugin_ver oa_var="s_sun_plugin_ver">1.5.0_13</sun_plugin_ver>

         <sun_plugin_type oa_var="s_sun_plugin_type">jdk</sun_plugin_type>

[appltest@derp ~]$ grep jinit_ver_comma $CONTEXT_FILE

         <jinit_ver_comma oa_var="s_jinit_ver_comma">1.5.0_13</jinit_ver_comma>

OS is Red Hat Enterprise Linux Server release 6.4 , kindly suggest at what version I can upgrade java for EBS .

Also Could you please suggest the docs which I can refer to upgrade JRE plugin.