diff --git a/environment.yml b/environment.yml
index fdb2c3e7388e384f75e62761525a4fddbc29f7a3..7db9cc415615a68b8b28c9823af43f15563081f2 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,6 +6,7 @@ dependencies:
   - python>=3.6
   - ipython
   - coffea<2023
+  - correctionlib<=2.5.0
   - pyaml
   - xrootd # use 5.6.4 if you experience problems, recommended as of March 2024
   - numba