diff --git a/README.md b/README.md
index 17c5cca..1a17616 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ class YourModel extends DomainModel
 ```php
 class DomainRule implements DomainRuleInterface
 {
-    public function on()
+    public static function on()
     {
         return YourModel::CREATION;
     }
diff --git a/Tests/Event/DelayedListenerTest.php b/Tests/Event/DelayedListenerTest.php
index ad42253..4719363 100644
--- a/Tests/Event/DelayedListenerTest.php
+++ b/Tests/Event/DelayedListenerTest.php
@@ -78,7 +78,7 @@ public function __construct(EntityManager $entityManager)
                 $this->entityManager = $entityManager;
             }
 
-            public function after()
+            public static function after()
             {
                 return [\FakeModel::class => 'action'];
             }
@@ -168,7 +168,7 @@ public function __construct(EntityManager $entityManager)
         $this->entityManager = $entityManager;
     }
 
-    public function after()
+    public static function after()
     {
         return [\FakeModel::class => 'action'];
     }
diff --git a/Tests/Event/DomainEventDispatcherTest.php b/Tests/Event/DomainEventDispatcherTest.php
index 4751940..dfd6736 100644
--- a/Tests/Event/DomainEventDispatcherTest.php
+++ b/Tests/Event/DomainEventDispatcherTest.php
@@ -29,7 +29,7 @@ public function execute(DomainEvent $event)
                 $event->getSubject()->setLowerFoo(strtolower($event->getSubject()->getFoo()));
             }
 
-            public function on()
+            public static function on()
             {
                 return 'foo.changed';
             }
@@ -81,7 +81,7 @@ public function execute(DomainEvent $event)
                 );
             }
 
-            public function on()
+            public static function on()
             {
                 return ['foo.changed', 'bar.changed'];
             }
@@ -139,7 +139,7 @@ public function testItRaiseOnPostPersist()
     {
         // Objects needed
         $rule = new class() implements PostPersistDomainRuleInterface {
-            public function after()
+            public static function after()
             {
                 return [\FakeModel::class => 'action'];
             }
@@ -173,12 +173,12 @@ public function testItRaiseRuleInBothCases()
         // Objects needed
         $rule = new class() implements PostPersistDomainRuleInterface, DomainRuleInterface {
             private $i = 0;
-            public function after()
+            public static function after()
             {
                 return [\FakeModel::class => 'action'];
             }
 
-            public function on()
+            public static function on()
             {
                 return 'previous_action';
             }
diff --git a/Tests/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPassTest.php b/Tests/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPassTest.php
index 348485b..428181c 100644
--- a/Tests/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPassTest.php
+++ b/Tests/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPassTest.php
@@ -80,7 +80,7 @@ class FooRule implements DomainRuleInterface
 {
     public function execute(DomainEvent $event) {}
 
-    public function on()
+    public static function on()
     {
         return 'test.event';
     }
diff --git a/composer.json b/composer.json
index fe52573..326aa0f 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,8 @@
         "php": ">=7.1",
         "symfony/event-dispatcher": "^4.3|^5.0",
         "doctrine/doctrine-bundle": "^1.8|^2.0",
-        "doctrine/orm": "^2.6.3"
+        "doctrine/orm": "^2.6.3",
+        "symfony/proxy-manager-bridge": "^4.4"
     },
     "authors": [
         {
diff --git a/docs/domain_event_dispatcher.md b/docs/domain_event_dispatcher.md
index 980ae7a..ace1533 100644
--- a/docs/domain_event_dispatcher.md
+++ b/docs/domain_event_dispatcher.md
@@ -24,7 +24,7 @@ $dispatcher->addRule(new class implements DomainRuleInterface {
         // add some specific behavior
     }
     
-    public function on() {
+    public static function on() {
         return 'on.event';
     }
 });
@@ -44,7 +44,7 @@ $dispatcher->addRule(new class implements PostPersistDomainRuleInterface {
         // add some specific behavior
     }
     
-    public function after() {
+    public static function after() {
         return 'on.event'; // You have to specify the model
     }
 });
diff --git a/src/Integration/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPass.php b/src/Integration/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPass.php
index c008502..f8885b0 100644
--- a/src/Integration/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPass.php
+++ b/src/Integration/Symfony/DependencyInjection/CompilerPass/RegisterDomainRulesCompilerPass.php
@@ -27,6 +27,7 @@ public function process(ContainerBuilder $container)
                     $this->addListenerForEventsInDefinition($id, $class, $attribute, $definition);
                 }
             } else {
+                $def->setLazy(true);
                 $definition->addMethodCall('addRule', [
                     new Reference($id),
                 ]);
diff --git a/src/Rule/DomainRuleInterface.php b/src/Rule/DomainRuleInterface.php
index 5f76223..65ad5f4 100644
--- a/src/Rule/DomainRuleInterface.php
+++ b/src/Rule/DomainRuleInterface.php
@@ -9,5 +9,5 @@ interface DomainRuleInterface extends RuleInterface
      *
      * @return array|string
      */
-    public function on();
+    public static function on();
 }
diff --git a/src/Rule/PostPersistDomainRuleInterface.php b/src/Rule/PostPersistDomainRuleInterface.php
index 40b9db4..5f06d05 100644
--- a/src/Rule/PostPersistDomainRuleInterface.php
+++ b/src/Rule/PostPersistDomainRuleInterface.php
@@ -15,5 +15,5 @@ interface PostPersistDomainRuleInterface extends RuleInterface
      *
      * @return array|string
      */
-    public function after();
+    public static function after();
 }