diff --git a/src/Mapping/Annotation/Blameable.php b/src/Mapping/Annotation/Blameable.php
index 72c5223599..5516e5d68a 100644
--- a/src/Mapping/Annotation/Blameable.php
+++ b/src/Mapping/Annotation/Blameable.php
@@ -45,7 +45,7 @@ public function __construct(
         string $on = 'update',
         $field = null,
         $value = null,
-        string $setterMethod = null
+        ?string $setterMethod = null
     ) {
         if ([] !== $data) {
             @trigger_error(sprintf(
diff --git a/src/Mapping/Annotation/IpTraceable.php b/src/Mapping/Annotation/IpTraceable.php
index 2c9c792f24..26c743c41d 100644
--- a/src/Mapping/Annotation/IpTraceable.php
+++ b/src/Mapping/Annotation/IpTraceable.php
@@ -45,7 +45,7 @@ public function __construct(
         string $on = 'update',
         $field = null,
         $value = null,
-        string $setterMethod = null
+        ?string $setterMethod = null
     ) {
         if ([] !== $data) {
             @trigger_error(sprintf(
diff --git a/src/Mapping/Annotation/SoftDeleteable.php b/src/Mapping/Annotation/SoftDeleteable.php
index f6c391f5a9..c1bed329b4 100644
--- a/src/Mapping/Annotation/SoftDeleteable.php
+++ b/src/Mapping/Annotation/SoftDeleteable.php
@@ -44,7 +44,7 @@ public function __construct(
         string $fieldName = 'deletedAt',
         bool $timeAware = false,
         bool $hardDelete = true,
-        string $setterMethod = null
+        ?string $setterMethod = null
     ) {
         if ([] !== $data) {
             @trigger_error(sprintf(
diff --git a/src/Mapping/Annotation/Timestampable.php b/src/Mapping/Annotation/Timestampable.php
index cae3eb7689..2c18a13c88 100644
--- a/src/Mapping/Annotation/Timestampable.php
+++ b/src/Mapping/Annotation/Timestampable.php
@@ -45,7 +45,7 @@ public function __construct(
         string $on = 'update',
         $field = null,
         $value = null,
-        string $setterMethod = null
+        ?string $setterMethod = null
     ) {
         if ([] !== $data) {
             @trigger_error(sprintf(