diff --git a/bwa.wdl b/bwa.wdl
index a95bb25441cb43823cff7aee5975b7f2782721b6..0a2cb1a32afd56c9239f8b141180be120b6618ba 100644
--- a/bwa.wdl
+++ b/bwa.wdl
@@ -6,7 +6,7 @@ task mem {
     String? outputFile = "aligned.bam"
     String? preCommand
     Int? threads = 1
-    Int? memory = 4
+    Int? memory = 8
     Int? minimumSeedLength
     Int? w
     Int? d