diff --git a/ordinis-domain/src/main/java/cloud/nstart/terravault/ordinis/domain/audit/AuditLogRepository.java b/ordinis-domain/src/main/java/cloud/nstart/terravault/ordinis/domain/audit/AuditLogRepository.java
index 55280f7..deec49b 100644
--- a/ordinis-domain/src/main/java/cloud/nstart/terravault/ordinis/domain/audit/AuditLogRepository.java
+++ b/ordinis-domain/src/main/java/cloud/nstart/terravault/ordinis/domain/audit/AuditLogRepository.java
@@ -23,6 +23,10 @@ public interface AuditLogRepository extends JpaRepository<AuditLog, Long> {
   /**
    * Гибкий запрос для admin UI: фильтры nullable, NULL = «не фильтруем».
    * Сортировка задаётся {@link Pageable}.
+   *
+   * <p>Для {@code from}/{@code to} (OffsetDateTime) NULL не передаём — PostgreSQL не
+   * может вывести тип параметра из {@code IS NULL} проверки. Вместо этого
+   * controller подставляет {@link OffsetDateTime#MIN} / {@link OffsetDateTime#MAX}.
    */
   @Query("""
       SELECT a FROM AuditLog a
@@ -30,8 +34,8 @@ public interface AuditLogRepository extends JpaRepository<AuditLog, Long> {
         AND (:userId IS NULL OR a.userId = :userId)
         AND (:action IS NULL OR a.action = :action)
         AND (:businessKey IS NULL OR a.businessKey = :businessKey)
-        AND (:from IS NULL OR a.eventTime >= :from)
-        AND (:to IS NULL OR a.eventTime <= :to)
+        AND a.eventTime >= :from
+        AND a.eventTime <= :to
       """)
   Page<AuditLog> search(
       @Param("dictionaryName") String dictionaryName,
diff --git a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AuditAdminController.java b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AuditAdminController.java
index e983ea9..18eabe5 100644
--- a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AuditAdminController.java
+++ b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/web/AuditAdminController.java
@@ -52,8 +52,8 @@ public class AuditAdminController {
         nullIfBlank(userId),
         nullIfBlank(action),
         nullIfBlank(businessKey),
-        from,
-        to,
+        from == null ? OffsetDateTime.parse("0001-01-01T00:00:00Z") : from,
+        to == null ? OffsetDateTime.parse("9999-12-31T23:59:59Z") : to,
         PageRequest.of(page, Math.min(size, 200), Sort.by(Sort.Direction.DESC, "eventTime")));
     return result.map(AuditEntry::from);
   }
@@ -71,8 +71,8 @@ public class AuditAdminController {
         nullIfBlank(userId),
         nullIfBlank(action),
         nullIfBlank(businessKey),
-        from,
-        to,
+        from == null ? OffsetDateTime.parse("0001-01-01T00:00:00Z") : from,
+        to == null ? OffsetDateTime.parse("9999-12-31T23:59:59Z") : to,
         PageRequest.of(0, MAX_EXPORT_ROWS, Sort.by(Sort.Direction.DESC, "eventTime")));
 
     StringBuilder csv = new StringBuilder(