diff --git a/biopet/sampleconfig.wdl b/biopet/sampleconfig.wdl
index d7ae6d274b19f312f4ccf04927e5a6e1c77f6b33..61defae84ff0583b3515f16a8e6948bbc564c84a 100644
--- a/biopet/sampleconfig.wdl
+++ b/biopet/sampleconfig.wdl
@@ -1,3 +1,5 @@
+version 1.0
+
 task SampleConfig {
     input {
         File? toolJar