diff --git a/ci/environment.yaml b/ci/environment.yaml
index 488aa44..b002ee0 100644
--- a/ci/environment.yaml
+++ b/ci/environment.yaml
@@ -5,7 +5,7 @@ dependencies:
   - pip
   - numpy>=1.21
   - scipy
-  - mcrfile
+  - mrcfile
   - sphinx<7.0
   - pip:
     - sphinx-sitemap