diff --git a/src/collective/dms/basecontent/widget.py b/src/collective/dms/basecontent/widget.py
index 6990ea2..46856d3 100644
--- a/src/collective/dms/basecontent/widget.py
+++ b/src/collective/dms/basecontent/widget.py
@@ -46,7 +46,7 @@ class LDAPEmailsSearch(BaseSearch):
         found = False
 
         for term in vocabulary:
-            if search_term in term.token:
+            if search_term.lower() in term.token.lower():
                 found = True
                 yield {
                     "text": term.value,