diff --git a/environment.yml b/environment.yml
index 02fef4f9226..c0f5a75d1d1 100644
--- a/environment.yml
+++ b/environment.yml
@@ -15,6 +15,7 @@ dependencies:
   - cachetools
   - certifi
   - cmreshandler >1.0.0b4
+  - cwltool
   - db12
   - elasticsearch <7.14
   - elasticsearch-dsl
diff --git a/setup.cfg b/setup.cfg
index 8dad1b3ab22..29a53b6092a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -30,6 +30,7 @@ install_requires =
     botocore
     cachetools
     certifi
+    cwltool
     diraccfg
     db12
     fts3