diff --git a/.github/environment.yml b/.github/environment.yml
index 998895c..bb3fea1 100644
--- a/.github/environment.yml
+++ b/.github/environment.yml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
 dependencies:
   - scikit-build-core
-  - numpy = 2.0
+  - numpy = 1
   - pdal
   - compilers
   - python