diff --git a/packages/tool_util/setup.cfg b/packages/tool_util/setup.cfg
index ef2fcc11ef4..67cb76a4916 100644
--- a/packages/tool_util/setup.cfg
+++ b/packages/tool_util/setup.cfg
@@ -55,6 +55,7 @@ console_scripts =
 [options.extras_require]
 cwl =
     cwltool==3.1.20211107152837
+    schema-salad==8.3.20220525163636
 mulled =
     jinja2
     Whoosh