diff --git a/Workbench/configs-and-secrets/grouper/application/grouper.properties b/Workbench/configs-and-secrets/grouper/application/grouper.properties
index c931287..086d9a6 100644
--- a/Workbench/configs-and-secrets/grouper/application/grouper.properties
+++ b/Workbench/configs-and-secrets/grouper/application/grouper.properties
@@ -23,3 +23,9 @@ groups.wheel.group                    = etc:sysadmingroup
 # Used to allow Include Exclude groups
 grouperIncludeExclude.use = true
 grouperIncludeExclude.requireGroups.use = true
+
+# to allow periods in id paths, changed with grouper 2.5.49
+stem.validateExtensionByDefault = false
+group.validateExtensionByDefault = false
+attributeDef.validateExtensionByDefault = false
+attributeDefName.validateExtensionByDefault = false