diff --git a/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/vt/Vt.scala b/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/vt/Vt.scala
index 7d57fd76df7161412a1119d0189bb9825ab701ea..08c04857a60297d0aa8c268764d7bff44a3866ac 100644
--- a/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/vt/Vt.scala
+++ b/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/vt/Vt.scala
@@ -15,7 +15,7 @@
  */
 package nl.lumc.sasc.biopet.extensions.vt
 
-import nl.lumc.sasc.biopet.core.{ Version, BiopetCommandLineFunction }
+import nl.lumc.sasc.biopet.core.BiopetCommandLineFunction
 
 /**
  * General vt extension