diff --git a/config/services.yaml b/config/services.yaml
index fd968d79..c273e511 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -65,6 +65,9 @@ services:
     App\Validator\Constraints\TimesheetValidator:
         arguments: [!tagged timesheet.validator]
 
+    App\Validator\Constraints\ProjectValidator:
+        arguments: [!tagged project.validator]
+        
     App\Validator\Constraints\QuickEntryTimesheetValidator:
         arguments: [!tagged timesheet.validator]
 
diff --git a/src/Kernel.php b/src/Kernel.php
index 9a3cd60d..b0e90cf9 100644
--- a/src/Kernel.php
+++ b/src/Kernel.php
@@ -27,6 +27,7 @@ use App\Saml\Security\SamlFactory;
 use App\Timesheet\CalculatorInterface as TimesheetCalculator;
 use App\Timesheet\Rounding\RoundingInterface;
 use App\Timesheet\TrackingMode\TrackingModeInterface;
+use App\Validator\Constraints\ProjectConstraint;
 use App\Validator\Constraints\TimesheetConstraint;
 use App\Widget\WidgetInterface;
 use App\Widget\WidgetRendererInterface;
@@ -60,6 +61,7 @@ class Kernel extends BaseKernel
     public const TAG_TIMESHEET_EXPORTER = 'timesheet.exporter';
     public const TAG_TIMESHEET_TRACKING_MODE = 'timesheet.tracking_mode';
     public const TAG_TIMESHEET_ROUNDING_MODE = 'timesheet.rounding_mode';
+    public const TAG_PROJECT_VALIDATOR = 'project.validator';
 
     public function getCacheDir()
     {
@@ -87,6 +89,7 @@ class Kernel extends BaseKernel
         $container->registerForAutoconfiguration(TrackingModeInterface::class)->addTag(self::TAG_TIMESHEET_TRACKING_MODE);
         $container->registerForAutoconfiguration(RoundingInterface::class)->addTag(self::TAG_TIMESHEET_ROUNDING_MODE);
         $container->registerForAutoconfiguration(TimesheetConstraint::class)->addTag(self::TAG_TIMESHEET_VALIDATOR);
+        $container->registerForAutoconfiguration(ProjectConstraint::class)->addTag(self::TAG_PROJECT_VALIDATOR);
 
         /** @var SecurityExtension $extension */
         $extension = $container->getExtension('security');
diff --git a/src/Validator/Constraints/ProjectConstraint.php b/src/Validator/Constraints/ProjectConstraint.php
new file mode 100644
index 00000000..ef7c5795
--- /dev/null
+++ b/src/Validator/Constraints/ProjectConstraint.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * Extend this class if you want to add dynamic project validation (eg. via a bundle).
+ */
+abstract class ProjectConstraint extends Constraint
+{
+}
diff --git a/src/Validator/Constraints/ProjectValidator.php b/src/Validator/Constraints/ProjectValidator.php
index 76f38960..18d668d1 100644
--- a/src/Validator/Constraints/ProjectValidator.php
+++ b/src/Validator/Constraints/ProjectValidator.php
@@ -18,6 +18,19 @@ use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 class ProjectValidator extends ConstraintValidator
 {
+    /**
+     * @var Constraint[]
+     */
+    private $constraints;
+
+    /**
+     * @param Constraint[] $constraints
+     */
+    public function __construct(iterable $constraints = [])
+    {
+        $this->constraints = $constraints;
+    }
+
     /**
      * @param Project|mixed $value
      * @param Constraint $constraint
@@ -33,6 +46,13 @@ class ProjectValidator extends ConstraintValidator
         }
 
         $this->validateProject($value, $this->context);
+
+        foreach ($this->constraints as $constraint) {
+            $this->context
+                ->getValidator()
+                ->inContext($this->context)
+                ->validate($value, $constraint, [Constraint::DEFAULT_GROUP]);
+        }
     }
 
     protected function validateProject(Project $project, ExecutionContextInterface $context)