diff --git a/app/Service/Import/Importers/ClockifyProjectsImporter.php b/app/Service/Import/Importers/ClockifyProjectsImporter.php
index 7a697c26..dd3da285 100644
--- a/app/Service/Import/Importers/ClockifyProjectsImporter.php
+++ b/app/Service/Import/Importers/ClockifyProjectsImporter.php
@@ -54,6 +54,7 @@ class ClockifyProjectsImporter extends DefaultImporter
                 if ($tasksKey !== null && $record[$tasksKey] !== '') {
                     $tasks = explode(', ', $record[$tasksKey]);
                     foreach ($tasks as $task) {
+                        $this->checkTaskNameLength($task);
                         $this->taskImportHelper->getKey([
                             'name' => $task,
                             'project_id' => $projectId,
diff --git a/app/Service/Import/Importers/ClockifyTimeEntriesImporter.php b/app/Service/Import/Importers/ClockifyTimeEntriesImporter.php
index ef8b1ca9..0cc16847 100644
--- a/app/Service/Import/Importers/ClockifyTimeEntriesImporter.php
+++ b/app/Service/Import/Importers/ClockifyTimeEntriesImporter.php
@@ -103,6 +103,7 @@ class ClockifyTimeEntriesImporter extends DefaultImporter
                 }
                 $taskId = null;
                 if (! $isBreak && $taskKey !== null && $record[$taskKey] !== '') {
+                    $this->checkTaskNameLength($record[$taskKey]);
                     $taskId = $this->taskImportHelper->getKey([
                         'name' => $record[$taskKey],
                         'project_id' => $projectId,
diff --git a/app/Service/Import/Importers/DefaultImporter.php b/app/Service/Import/Importers/DefaultImporter.php
index af6c6081..8cda78dd 100644
--- a/app/Service/Import/Importers/DefaultImporter.php
+++ b/app/Service/Import/Importers/DefaultImporter.php
@@ -21,6 +21,8 @@ use Illuminate\Database\Eloquent\Builder;
 
 abstract class DefaultImporter implements ImporterContract
 {
+    protected const TASK_NAME_MAX_LENGTH = 500;
+
     protected Organization $organization;
 
     /**
@@ -181,6 +183,16 @@ abstract class DefaultImporter implements ImporterContract
         $this->billableRateService = app(BillableRateService::class);
     }
 
+    /**
+     * @throws ImportException
+     */
+    protected function checkTaskNameLength(string $taskName): void
+    {
+        if (strlen($taskName) > self::TASK_NAME_MAX_LENGTH) {
+            throw new ImportException('Task name ("'.$taskName.'") is too long, maximum length is '.self::TASK_NAME_MAX_LENGTH.' characters');
+        }
+    }
+
     #[\Override]
     public function getReport(): ReportDto
     {
diff --git a/app/Service/Import/Importers/GenericTimeEntriesImporter.php b/app/Service/Import/Importers/GenericTimeEntriesImporter.php
index 6ba1ac83..f5745ac7 100644
--- a/app/Service/Import/Importers/GenericTimeEntriesImporter.php
+++ b/app/Service/Import/Importers/GenericTimeEntriesImporter.php
@@ -113,6 +113,7 @@ class GenericTimeEntriesImporter extends DefaultImporter
                 }
                 $taskId = null;
                 if ($record['task'] !== '') {
+                    $this->checkTaskNameLength($record['task']);
                     $taskId = $this->taskImportHelper->getKey([
                         'name' => $record['task'],
                         'project_id' => $projectId,
diff --git a/app/Service/Import/Importers/HarvestTimeEntriesImporter.php b/app/Service/Import/Importers/HarvestTimeEntriesImporter.php
index 1a1aade7..57a66f49 100644
--- a/app/Service/Import/Importers/HarvestTimeEntriesImporter.php
+++ b/app/Service/Import/Importers/HarvestTimeEntriesImporter.php
@@ -92,6 +92,7 @@ class HarvestTimeEntriesImporter extends DefaultImporter
                 }
                 $taskId = null;
                 if ($record['Task'] !== '') {
+                    $this->checkTaskNameLength($record['Task']);
                     $taskId = $this->taskImportHelper->getKey([
                         'name' => $record['Task'],
                         'project_id' => $projectId,
diff --git a/app/Service/Import/Importers/SolidtimeImporter.php b/app/Service/Import/Importers/SolidtimeImporter.php
index 677b48bd..f6eade0e 100644
--- a/app/Service/Import/Importers/SolidtimeImporter.php
+++ b/app/Service/Import/Importers/SolidtimeImporter.php
@@ -199,6 +199,7 @@ class SolidtimeImporter extends DefaultImporter
                 if ($projectId === null) {
                     throw new Exception('Project does not exist');
                 }
+                $this->checkTaskNameLength($task['name']);
                 $this->taskImportHelper->getKey([
                     'name' => $task['name'],
                     'project_id' => $projectId,
diff --git a/app/Service/Import/Importers/TogglDataImporter.php b/app/Service/Import/Importers/TogglDataImporter.php
index ec23dfb7..668d462a 100644
--- a/app/Service/Import/Importers/TogglDataImporter.php
+++ b/app/Service/Import/Importers/TogglDataImporter.php
@@ -189,6 +189,7 @@ class TogglDataImporter extends DefaultImporter
                     if ($projectId === null) {
                         throw new Exception('Project does not exist');
                     }
+                    $this->checkTaskNameLength($task->name);
                     $this->taskImportHelper->getKey([
                         'name' => $task->name,
                         'project_id' => $projectId,
diff --git a/app/Service/Import/Importers/TogglTimeEntriesImporter.php b/app/Service/Import/Importers/TogglTimeEntriesImporter.php
index 95fef716..7b56f89d 100644
--- a/app/Service/Import/Importers/TogglTimeEntriesImporter.php
+++ b/app/Service/Import/Importers/TogglTimeEntriesImporter.php
@@ -97,6 +97,7 @@ class TogglTimeEntriesImporter extends DefaultImporter
                 }
                 $taskId = null;
                 if ($record['Task'] !== '') {
+                    $this->checkTaskNameLength($record['Task']);
                     $taskId = $this->taskImportHelper->getKey([
                         'name' => $record['Task'],
                         'project_id' => $projectId,
diff --git a/tests/Unit/Service/Import/Importers/GenericTimeEntriesImporterTest.php b/tests/Unit/Service/Import/Importers/GenericTimeEntriesImporterTest.php
index 65c73eb4..69db995c 100644
--- a/tests/Unit/Service/Import/Importers/GenericTimeEntriesImporterTest.php
+++ b/tests/Unit/Service/Import/Importers/GenericTimeEntriesImporterTest.php
@@ -66,4 +66,27 @@ class GenericTimeEntriesImporterTest extends ImporterTestAbstract
         $this->assertSame(0, $report->projectsCreated);
         $this->assertSame(0, $report->clientsCreated);
     }
+
+    public function test_import_fails_if_task_name_is_too_long(): void
+    {
+        // Arrange
+        $organization = Organization::factory()->create();
+        $timezone = 'Europe/Vienna';
+        $importer = new GenericTimeEntriesImporter;
+        $importer->init($organization);
+        $taskName = str_repeat('a', 501);
+        $data = "description,billable,client,project,tags,start,end,task,user_name,user_email\n".
+            '"Working hard","true","Big Company","Project for Big Company","","2024-03-04T09:23:00Z","2024-03-04T10:23:01Z","'.$taskName.'","Peter Tester","peter.test@email.test"';
+
+        // Act
+        try {
+            $importer->importData($data, $timezone);
+        } catch (ImportException $e) {
+            // Assert
+            $this->assertSame('Task name ("'.$taskName.'") is too long, maximum length is 500 characters', $e->getMessage());
+
+            return;
+        }
+        $this->fail();
+    }
 }