diff --git a/environment.yml b/environment.yml
index f3498d2f..be4dbeb3 100644
--- a/environment.yml
+++ b/environment.yml
@@ -17,7 +17,7 @@ dependencies:
   - bluesky
   - databroker <=1.999
   - hkl
-  - numpy
+  - numpy <=1.999
   - ophyd
   - packaging
   - pint