diff --git a/construct.yaml b/construct.yaml
index 5aaf905..5096af0 100644
--- a/construct.yaml
+++ b/construct.yaml
@@ -71,6 +71,7 @@ specs:
   # Others
   - cachetools
   - celery >=5.2.6
+  - cwltool
   - db12 >=1.0.4
   - diraccfg >=0.2.2
   - future