diff --git a/application/Espo/Core/MassAction/Service.php b/application/Espo/Core/MassAction/Service.php
index 0882ace220..dc9f7b275b 100644
--- a/application/Espo/Core/MassAction/Service.php
+++ b/application/Espo/Core/MassAction/Service.php
@@ -147,7 +147,8 @@ class Service
         $entity = $this->entityManager->createEntity(MassActionEntity::ENTITY_TYPE, [
             'entityType' => $entityType,
             'action' => $action,
-            'params' => serialize($params),
+            // Additional encoding to handle null-character issue in PostgreSQL.
+            'params' => base64_encode(serialize($params)),
             'data' => $data,
         ]);
 
diff --git a/application/Espo/Entities/Export.php b/application/Espo/Entities/Export.php
index 0137f6c694..b3bc722bd0 100644
--- a/application/Espo/Entities/Export.php
+++ b/application/Espo/Entities/Export.php
@@ -58,7 +58,7 @@ class Export extends Entity
         }
 
         /** @var Params $params */
-        $params = unserialize($raw);
+        $params = unserialize(base64_decode($raw));
 
         return $params;
     }
diff --git a/application/Espo/Entities/MassAction.php b/application/Espo/Entities/MassAction.php
index c95e2148c4..9dcda71cee 100644
--- a/application/Espo/Entities/MassAction.php
+++ b/application/Espo/Entities/MassAction.php
@@ -61,7 +61,7 @@ class MassAction extends Entity
         }
 
         /** @var Params $params */
-        $params = unserialize($raw);
+        $params = unserialize(base64_decode($raw));
 
         return $params;
     }
diff --git a/application/Espo/Tools/Export/Service.php b/application/Espo/Tools/Export/Service.php
index ba98b56ff9..c9d0e52788 100644
--- a/application/Espo/Tools/Export/Service.php
+++ b/application/Espo/Tools/Export/Service.php
@@ -133,7 +133,8 @@ class Service
     private function schedule(Params $params): ServiceResult
     {
         $entity = $this->entityManager->createEntity(ExportEntity::ENTITY_TYPE, [
-            'params' => serialize($params),
+            // Additional encoding to handle null-character issue in PostgreSQL.
+            'params' => base64_encode(serialize($params)),
         ]);
 
         $this->jobSchedulerFactory