diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index f8a527766..e4e78f405 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -17,3 +17,4 @@ dependencies:
 - scipy =1.11.3
 - spglib =2.0.2
 - sqsgenerator =0.3
+- pyxtal =0.6.0