diff --git a/environment.yml b/environment.yml
index 0876546..c53a09a 100644
--- a/environment.yml
+++ b/environment.yml
@@ -14,6 +14,7 @@ dependencies:
   - statsmodels >=0.10
   - scikit-learn
   - conda-forge::glmnet_py !=1.0.1,!=1.0.2 # avoids errors in GH actions
+  - scipy=1.7.0 # avoid errors with older glmnet_py
   - pysam >=0.15.3
   - dendropy >=4.4.0
   - matplotlib-base