diff --git a/env.yaml b/env.yaml
index b24f8fd..1806668 100644
--- a/env.yaml
+++ b/env.yaml
@@ -60,3 +60,4 @@ dependencies:
   - yaml=0.2.5=h7f98852_2
   - pip:
       - nameparser==1.1.3
+      - cerberus==1.3.5