diff --git a/environment.yml b/environment.yml
index 6d64652..2542546 100644
--- a/environment.yml
+++ b/environment.yml
@@ -18,7 +18,7 @@ dependencies:
   - pytest-cov
   # For running
   - astropy
-  - boto3
+  - boto3<1.36.0  # FIXME: remove top pin when tests no longer fail
   - fiona
   - gdal>=3.7
   - geopandas