diff --git a/app/Member/Member.php b/app/Member/Member.php
index 0cdb50c4..23e7f267 100644
--- a/app/Member/Member.php
+++ b/app/Member/Member.php
@@ -175,9 +175,9 @@ class Member extends Model
         return $this->memberships()->isLeader()->exists();
     }
 
-    public function getAge(): int
+    public function getAge(): ?int
     {
-        return $this->birthday->diffInYears(now());
+        return $this->birthday?->diffInYears(now());
     }
 
     // ---------------------------------- Relations ----------------------------------
diff --git a/app/Member/MemberResource.php b/app/Member/MemberResource.php
index f5552ad9..dc96b6e5 100644
--- a/app/Member/MemberResource.php
+++ b/app/Member/MemberResource.php
@@ -35,8 +35,8 @@ class MemberResource extends JsonResource
             'zip' => $this->zip,
             'location' => $this->location,
             'send_newspaper' => $this->send_newspaper,
-            'birthday' => $this->birthday->format('Y-m-d'),
-            'birthday_human' => $this->birthday->format('d.m.Y'),
+            'birthday' => $this->birthday?->format('Y-m-d'),
+            'birthday_human' => $this->birthday?->format('d.m.Y'),
             'joined_at' => $this->joined_at->format('Y-m-d'),
             'joined_at_human' => $this->joined_at->format('d.m.Y'),
             'id' => $this->id,
@@ -100,7 +100,7 @@ class MemberResource extends JsonResource
 
     /**
      * @return array<string, mixed>
-     */ 
+     */
     public static function meta(): array
     {
         return [
diff --git a/database/migrations/2023_03_05_230539_edit_members_birthday_column.php b/database/migrations/2023_03_05_230539_edit_members_birthday_column.php
new file mode 100644
index 00000000..c5d0ca97
--- /dev/null
+++ b/database/migrations/2023_03_05_230539_edit_members_birthday_column.php
@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class() extends Migration {
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('members', function (Blueprint $table) {
+            $table->date('birthday')->nullable(true)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('members', function (Blueprint $table) {
+            $table->date('birthday')->nullable(false)->change();
+        });
+    }
+};
diff --git a/database/migrations/2023_03_05_231245_edit_members_address_column.php b/database/migrations/2023_03_05_231245_edit_members_address_column.php
new file mode 100644
index 00000000..57e2b123
--- /dev/null
+++ b/database/migrations/2023_03_05_231245_edit_members_address_column.php
@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class() extends Migration {
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('members', function (Blueprint $table) {
+            $table->string('address')->nullable(true)->change();
+            $table->string('zip')->nullable(true)->change();
+            $table->string('location')->nullable(true)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('members', function (Blueprint $table) {
+            $table->string('address')->nullable(false)->change();
+            $table->string('zip')->nullable(false)->change();
+            $table->string('location')->nullable(false)->change();
+        });
+    }
+};
diff --git a/tests/Feature/Member/IndexTest.php b/tests/Feature/Member/IndexTest.php
index 60097424..16441859 100644
--- a/tests/Feature/Member/IndexTest.php
+++ b/tests/Feature/Member/IndexTest.php
@@ -8,7 +8,6 @@ use App\Member\Member;
 use App\Member\Membership;
 use App\Payment\Payment;
 use App\Subactivity;
-use Carbon\Carbon;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
 use Tests\RequestFactories\Child;
 use Tests\TestCase;
@@ -36,6 +35,25 @@ class IndexTest extends TestCase
         $this->assertInertiaHas($group->id, $response, 'data.data.0.group_id');
     }
 
+    public function testFieldsCanBeNull(): void
+    {
+        $this->withoutExceptionHandling()->login()->loginNami();
+        $group = Group::factory()->create();
+        Member::factory()->defaults()->for($group)->create([
+            'birthday' => null,
+            'address' => null,
+            'zip' => null,
+            'location' => null,
+        ]);
+
+        $response = $this->get('/member');
+
+        $this->assertInertiaHas(null, $response, 'data.data.0.birthday');
+        $this->assertInertiaHas(null, $response, 'data.data.0.address');
+        $this->assertInertiaHas(null, $response, 'data.data.0.zip');
+        $this->assertInertiaHas(null, $response, 'data.data.0.location');
+    }
+
     public function testItShowsEfzForEfzMembership(): void
     {
         $this->withoutExceptionHandling()->login()->loginNami();
@@ -159,5 +177,4 @@ class IndexTest extends TestCase
 
         $this->assertInertiaHas('UUI', $response, 'data.meta.groups.1.name');
     }
-
 }