diff --git a/src/DataSource/DoctrineDataSource.php b/src/DataSource/DoctrineDataSource.php
index af2201f4..721af463 100755
--- a/src/DataSource/DoctrineDataSource.php
+++ b/src/DataSource/DoctrineDataSource.php
@@ -289,8 +289,10 @@ protected function applyFilterText(FilterText $filter): void
 
 			foreach ($words as $word) {
 				$exprs[] = $this->dataSource->expr()->like(
-					$c,
-					$this->dataSource->expr()->literal("%$word%")
+					$this->dataSource->expr()->lower($c),
+					$this->dataSource->expr()->lower(
+						$this->dataSource->expr()->literal("%$word%")
+					)
 				);
 			}
 		}