diff --git a/environment.yml b/environment.yml
index c812320..2a2f828 100644
--- a/environment.yml
+++ b/environment.yml
@@ -42,6 +42,6 @@ dependencies:
   - zstandard
   - conda-forge::eventio>=1.9.1,<2.0.0a0
   - pip:
-      - lstchain~=0.10.6
+      - lstchain==0.10.6
       - pint-pulsar<=0.9.7
       - more-itertools