diff --git a/ci-env.yml b/ci-env.yml
index cbfbd21..2de8b7c 100644
--- a/ci-env.yml
+++ b/ci-env.yml
@@ -16,4 +16,5 @@ dependencies:
   - torchvision
   - pip:
     - autograd
+    - peigen
     - proxmin
\ No newline at end of file