diff --git a/radioconda_installer.yaml b/radioconda_installer.yaml
index 60ff02d..89118a3 100644
--- a/radioconda_installer.yaml
+++ b/radioconda_installer.yaml
@@ -5,5 +5,5 @@ channels:
   - ryanvolz
 dependencies:
   - conda
-  - mamba
+  - mamba <2
   - miniforge_console_shortcut # [win]