diff --git a/subworkflow/bandpass.cwl b/subworkflow/bandpass.cwl
index 46dc66024b5b7d5cbba73b945ddf72c8a16f6bdf..70dc74b0a05f882028724f892eb7a21e1aef5c97 100644
--- a/subworkflow/bandpass.cwl
+++ b/subworkflow/bandpass.cwl
@@ -51,7 +51,7 @@ outputs:
   - id: msout
     outputSource:
       - applycal/msout
-    type: Directory
+    type: Directory[]
     'sbg:x': 1635.458984375
     'sbg:y': 451.6930847167969
 steps: