diff --git a/gatk.wdl b/gatk.wdl
index 512666fc2a863e4a7a5113305866221b0c63a7a5..99a5b2c472b2b812cdcdae9a0b6cfa5ff454599d 100644
--- a/gatk.wdl
+++ b/gatk.wdl
@@ -198,8 +198,8 @@ task GenotypeGVCFs {
 
         IndexedVcfFile? dbsnpVCF
 
-        Int memory = 4
-        Float memoryMultiplier =3.0
+        Int memory = 6
+        Float memoryMultiplier = 2.0
     }
 
     String dbsnpArg = if defined(dbsnpVCF) then "-D " + select_first([dbsnpVCF]).file else ""