diff --git a/environment_macOS.yml b/environment_macOS.yml
index 32e3714..36f569a 100644
--- a/environment_macOS.yml
+++ b/environment_macOS.yml
@@ -2,7 +2,6 @@ name: ggc_env
 channels:
   - conda-forge
   - bioconda
-  - defaults
 dependencies:
   - python>=3.9
   - cxx-compiler