diff --git a/Dockerfile b/Dockerfile
index dc6731d..b9026af 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ ENV HEUDICONVOWNER nipy
 ENV HEUDICONVTAG v1.3.2
 
 #bids validator version:
-ENV BIDSTAG 1.15.0
+ENV BIDSTAG 1.9.7
 
 #pydeface version:
 ENV PYDEFACETAG v2.0.2