diff --git a/Workbench/grouper_ws/Dockerfile b/Workbench/grouper_ws/Dockerfile
index f5dd564..71901bf 100644
--- a/Workbench/grouper_ws/Dockerfile
+++ b/Workbench/grouper_ws/Dockerfile
@@ -1,4 +1,4 @@
-FROM i2incommon/grouper:2.5.56
+FROM i2incommon/grouper:2.5.37.1
 
 LABEL author="tier-packaging@internet2.edu <tier-packaging@internet2.edu>"