diff --git a/ci/environment-py39.yml b/ci/environment-py39.yml
index 6c362c0..a2561f8 100644
--- a/ci/environment-py39.yml
+++ b/ci/environment-py39.yml
@@ -26,6 +26,6 @@ dependencies:
   - pyresample
   - scipy
   - xarray
-  - xgcm=0.5.0
+  - xgcm>=0.5.0
   - xmitgcm>=0.5.1
   - typing_extensions