diff --git a/src/main/java/org/example/team6backend/user/repository/AppUserRepository.java b/src/main/java/org/example/team6backend/user/repository/AppUserRepository.java
index 8f551fd..8504900 100644
--- a/src/main/java/org/example/team6backend/user/repository/AppUserRepository.java
+++ b/src/main/java/org/example/team6backend/user/repository/AppUserRepository.java
@@ -30,8 +30,8 @@ public interface AppUserRepository extends JpaRepository<AppUser, String> {
 	@Query("""
 			SELECT u
 			FROM AppUser u
-			WHERE (:email IS NULL OR LOWER(COALESCE(u.email, '')) LIKE LOWER(CONCAT('%', :email, '%')))
-			  AND (:name IS NULL OR LOWER(COALESCE(u.name, '')) LIKE LOWER(CONCAT('%', :name, '%')))
+			WHERE (:email IS NULL OR LOWER(CAST(COALESCE(u.email, '') AS string)) LIKE LOWER(CONCAT('%', CAST(:email AS string), '%')))
+			  AND (:name IS NULL OR LOWER(CAST(COALESCE(u.name, '') AS string)) LIKE LOWER(CONCAT('%', CAST(:name AS string), '%')))
 			  AND (:role IS NULL OR u.role = :role)
 			  AND (:active IS NULL OR u.active = :active)
 			""")
@@ -41,10 +41,11 @@ Page<AppUser> findAllWithFilters(@Param("email") String email, @Param("name") St
 	@Query("""
 			SELECT u
 			FROM AppUser u
-			WHERE LOWER(COALESCE(u.email, '')) LIKE LOWER(CONCAT('%', :search, '%'))
-			   OR LOWER(COALESCE(u.name, '')) LIKE LOWER(CONCAT('%', :search, '%'))
-			   OR LOWER(COALESCE(u.githubLogin, '')) LIKE LOWER(CONCAT('%', :search, '%'))
-			   OR LOWER(COALESCE(u.githubId, '')) LIKE LOWER(CONCAT('%', :search, '%'))
+			WHERE (:search IS NULL OR
+				LOWER(CAST(COALESCE(u.email, '') AS string)) LIKE LOWER(CONCAT('%', CAST(:search AS string), '%'))
+				OR LOWER(CAST(COALESCE(u.name, '') AS string)) LIKE LOWER(CONCAT('%', CAST(:search AS string), '%'))
+				OR LOWER(CAST(COALESCE(u.githubLogin, '') AS string)) LIKE LOWER(CONCAT('%', CAST(:search AS string), '%'))
+				OR LOWER(CAST(COALESCE(u.githubId, '') AS string)) LIKE LOWER(CONCAT('%', CAST(:search AS string), '%')))
 			""")
 	Page<AppUser> searchUsers(@Param("search") String search, Pageable pageable);
 }