diff --git a/bwa.wdl b/bwa.wdl
index 7c4627a17b257b8f67710a57efcc2357de1df13e..9c717ccd789bdde15d9a5f033f7efa82d49386be 100644
--- a/bwa.wdl
+++ b/bwa.wdl
@@ -12,7 +12,7 @@ task Mem {
 
         String? picardJar
 
-        Int threads = 1
+        Int threads = 2
         Int memory = 8
         Int picardMemory = 4
     }