diff --git a/env.yml b/env.yml
index ab2657e..79a38d3 100644
--- a/env.yml
+++ b/env.yml
@@ -34,6 +34,7 @@ dependencies:
   - fsl-fugue=2201.4
   - fsl-mcflirt=2111.0
   - fsl-miscmaths=2203.2
+  - fsl-oxford_asl=v4.0.29
   - fsl-topup=2203.2
   - pip
 variables: