The first of the two games is at the Cardiff City Stadium on Friday 7th September when they face Belgium. They follow that up on Tuesday 11th September with the game against Serbia which will be played in the Karadjordje Stadium in Novi Sad.
Vokes has won 22 caps for Wales since making his debut in May 2008. The last of those caps, his first as a Burnley player, came a couple of weeks ago when he lined up against Bosnia & Herzegovina in a friendly played at Llanelli.
The full squad is: Jason Brown (Aberdeen), Boaz Myhill (West Brom), Lewis Price (Crystal Palace), Darcy Blake (Crystal Palace), James Collins (West Ham), Chris Gunter (Reading), Joel Lynch (Huddersfield), Adam Matthews (Celtic), Sam Ricketts (Bolton), Neil Taylor (Swansea), Ashley Williams (Swansea), Joe Allen (Liverpool), Andrew Crofts (Brighton), David Edwards (Wolves), Andy King (Leicester), Aaron Ramsey (Arsenal), Jonathan Williams (Crystal Palace), Gareth Bale (Tottenham), Craig Bellamy (Cardiff), Simon Church (Reading), Steve Morison (Norwich), Hal Robson-Kanu (Reading), Sam Vokes (Burnley).