diff --git a/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/picard/Picard.scala b/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/picard/Picard.scala
index ad8ba8918722ee1abcc2b933739da210569f319b..167e0007a15596789a2d95203ca022e0dd3fbdda 100644
--- a/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/picard/Picard.scala
+++ b/biopet-extensions/src/main/scala/nl/lumc/sasc/biopet/extensions/picard/Picard.scala
@@ -60,7 +60,7 @@ abstract class Picard extends BiopetJavaCommandLineFunction with Version {
   def versionRegex = """Version: (.*)""".r
   override def versionExitcode = List(0, 1)
 
-  override def defaultCoreMemory = 3.0
+  override def defaultCoreMemory = 4.0
 
   override def getVersion = {
     if (jarFile == null) Picard.getBiopetPicardVersion