diff --git a/vs2-external-deps.yaml b/vs2-external-deps.yaml
index 6415b2e..db3f4ae 100644
--- a/vs2-external-deps.yaml
+++ b/vs2-external-deps.yaml
@@ -3,11 +3,11 @@ channels:
   - bioconda
   - defaults
 dependencies:
-  - python >=3.6
-  - ruamel.yaml =0.16.6
+  - python >=3.6,<=3.10
+  - ruamel.yaml =0.16
   - snakemake-minimal >=5.18,<=5.26
   - click >=7
   - git
   - cookiecutter
-  - mamba
-
+  - mamba <2
+  - conda-package-handling <=1.9