# What version of the Servlet Specification is supported by Virgo?

- Virgo Server for Apache Tomcat version 2.x uses embedded Apache Tomcat 6.0.y which supports Servlet Specification 2.5.

- Virgo Server for Apache Tomcat version 3.x uses embedded Apache Tomcat 7.0.y which supports Servlet Specification 3.0.

- Virgo Jetty Server version 3.0.x uses Jetty 7.y. which supports Servlet Specification 2.5.

- Virgo Jetty Server version 3.5.x uses Jetty 8.y which supports Servlet Specification 3.0.