diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index deed6b5..e2ff556 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -1,5 +1,4 @@
 channels:
-  - conda-forge
+- conda-forge
 dependencies:
-  - pyiron_base =0.8.3
-  
+- pyiron_base =0.9.11