diff --git a/requirements.txt b/requirements.txt
index 9db6dc5..659b82e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 bdbag>=1.4.1
 click~=8.1
-cwl-utils==0.29
+cwl-utils==0.31
 cwlprov==0.1.1
 networkx==3.1
 prov>=1.5.1