diff --git a/workflow/envs/arts.yaml b/workflow/envs/arts.yaml
index 7c280107..c5e75a8f 100644
--- a/workflow/envs/arts.yaml
+++ b/workflow/envs/arts.yaml
@@ -1,7 +1,6 @@
 name: arts_env
 channels:
   - conda-forge
-  - defaults
   - bioconda
 dependencies:
   - python==3.8