diff --git a/src/Bundle/ChillPersonBundle/Entity/Person.php b/src/Bundle/ChillPersonBundle/Entity/Person.php
index 59570f956..4680581cd 100644
--- a/src/Bundle/ChillPersonBundle/Entity/Person.php
+++ b/src/Bundle/ChillPersonBundle/Entity/Person.php
@@ -284,7 +284,7 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
      *     max=255,
      * )
      */
-    private $firstName;
+    private string $firstName = '';
 
     /**
      * fullname canonical. Read-only field, which is calculated by
@@ -294,7 +294,7 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
      *
      * @ORM\Column(type="text", nullable=true)
      */
-    private $fullnameCanonical;
+    private string $fullnameCanonical = '';
 
     /**
      * The person's gender.
@@ -353,7 +353,7 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
      *     max=255,
      * )
      */
-    private $lastName;
+    private string $lastName = '';
 
     /**
      * The marital status of the person.
@@ -1583,9 +1583,9 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
         return $this;
     }
 
-    public function setFirstName(string $firstName): self
+    public function setFirstName(?string $firstName): self
     {
-        $this->firstName = $firstName;
+        $this->firstName = (string) $firstName;
 
         return $this;
     }
@@ -1611,9 +1611,9 @@ class Person implements HasCenterInterface, TrackCreationInterface, TrackUpdateI
         return $this;
     }
 
-    public function setLastName(string $lastName): self
+    public function setLastName(?string $lastName): self
     {
-        $this->lastName = $lastName;
+        $this->lastName = (string) $lastName;
 
         return $this;
     }