diff --git a/environment.yml b/environment.yml
index f38f529..689cfca 100644
--- a/environment.yml
+++ b/environment.yml
@@ -22,5 +22,6 @@ dependencies:
   - fire
   - requests
   - dacite
+  - pydantic<2
   - pip:
       - git+https://github.com/jupyter-server/jupyter_releaser.git@v2