diff --git a/kallithea/controllers/home.py b/kallithea/controllers/home.py
--- a/kallithea/controllers/home.py
+++ b/kallithea/controllers/home.py
@@ -173,9 +173,9 @@ class HomeController(BaseController):
                     .filter(User.is_default_user == False) \
                     .filter(User.active == True) \
                     .filter(or_(
-                        User.username.like("%%"+query+"%%"),
-                        User.name.like("%%"+query+"%%"),
-                        User.lastname.like("%%"+query+"%%"),
+                        User.username.ilike("%%"+query+"%%"),
+                        User.name.ilike("%%"+query+"%%"),
+                        User.lastname.ilike("%%"+query+"%%"),
                     )) \
                     .order_by(User.username) \
                     .limit(500) \
@@ -198,7 +198,7 @@ class HomeController(BaseController):
                     grp_list = [grp]
             elif query:
                 grp_list = UserGroup.query() \
-                    .filter(UserGroup.users_group_name.like("%%"+query+"%%")) \
+                    .filter(UserGroup.users_group_name.ilike("%%"+query+"%%")) \
                     .filter(UserGroup.users_group_active == True) \
                     .order_by(UserGroup.users_group_name) \
                     .limit(500) \