diff --git a/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/kraken/Kraken.scala b/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/kraken/Kraken.scala
index 86df5c4151d114fcb2b654cbf7b0c28bb78b9bcf..e6b94712f2113abee03311c8082580677b7d06a0 100644
--- a/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/kraken/Kraken.scala
+++ b/public/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/kraken/Kraken.scala
@@ -53,7 +53,7 @@ class Kraken(val root: Configurable) extends BiopetCommandLineFunction with Vers
 
   def versionCommand = executable + " --version"
 
-  override def defaultCoreMemory = 8.0
+  override def defaultCoreMemory = 15.0
 
   override def defaultThreads = 4