diff --git a/gatk.wdl b/gatk.wdl
index 55a8079d638f3a8f2d4f9e75776c4a107d5d8fe0..60b81cd8eabac7e2b0b56f8e50c6458f6f6bd5cf 100644
--- a/gatk.wdl
+++ b/gatk.wdl
@@ -101,7 +101,7 @@ task CombineGVCFs {
         File referenceFastaDict
         File referenceFastaFai
 
-        String memory = "18G"
+        String memory = "24G"
         String javaXmx = "12G"
         String dockerImage = "quay.io/biocontainers/gatk4:4.1.0.0--0"
     }