diff --git a/astrocyte_pkg.yml b/astrocyte_pkg.yml
index 5d0a3a35ded5bd69d0d28cb2fddfa83ed8755e76..4ccb5716d5bcfe7d448aeef83c976a0f73bd7b1b 100755
--- a/astrocyte_pkg.yml
+++ b/astrocyte_pkg.yml
@@ -133,8 +133,8 @@ workflow_parameters:
     default: 'auto'
     choices:
       - [ 'auto', 'Auto Detect']
-      - [ '3', '3']
-      - [ '2', '2']
+      - [ 'three', '3']
+      - [ 'two', '2']
     required: true
     description: |
       10x single cell gene expression chemistry version (only used in cellranger version 2.x).