diff --git a/backend/database/factories/ChildFactory.php b/backend/database/factories/ChildFactory.php
index 055b54f7..42290e39 100644
--- a/backend/database/factories/ChildFactory.php
+++ b/backend/database/factories/ChildFactory.php
@@ -35,7 +35,7 @@ class ChildFactory extends Factory
             'password' => Hash::make('password'),
             'last_name' => $this->faker->lastName,
             'first_name' => $this->faker->firstName,
-            'image' => "/assets/img/avatar/avatar-sample02@2x.png",
+            'image' => '/assets/img/dummy/post-dummy01.jpg',
             'company' => $this->faker->company,
             'created_at' => $this->faker->dateTime,
             'updated_at' => $this->faker->dateTime,
diff --git a/backend/database/factories/FatherFactory.php b/backend/database/factories/FatherFactory.php
index 9cf4e1aa..a334a971 100644
--- a/backend/database/factories/FatherFactory.php
+++ b/backend/database/factories/FatherFactory.php
@@ -32,7 +32,7 @@ class FatherFactory extends Factory
             'email' => $this->faker->email,
             'password' => Hash::make('password'),
             'company' => $this->faker->company,
-            'image' => $this->faker->imageUrl,
+            'image' => '/assets/img/dummy/post-dummy01.jpg',
             'profile' => $this->faker->realText(49),
             'tel' => $tel[rand(0, 2)],
             'created_at' => $this->faker->dateTime,
diff --git a/backend/database/factories/MeetingFactory.php b/backend/database/factories/MeetingFactory.php
index 646de736..c011b953 100644
--- a/backend/database/factories/MeetingFactory.php
+++ b/backend/database/factories/MeetingFactory.php
@@ -25,7 +25,7 @@ class MeetingFactory extends Factory
             'father_id' => rand(1, 10),
             'title' => $this->faker->name,
             'text' => $this->faker->realText(49),
-            'pdf' => "https://crowdworks.jp/attachments/36836755.pdf",
+            'pdf' => '/assets/img/dummy/sample.pdf',
             'memo' => $this->faker->realText(49),
             'is_favorite' => $this->faker->numberBetween($min=0, $max=1),
             'created_at' => $this->faker->dateTime,
diff --git a/backend/database/factories/MeetingImageFactory.php b/backend/database/factories/MeetingImageFactory.php
index 4734bc52..af927b3a 100644
--- a/backend/database/factories/MeetingImageFactory.php
+++ b/backend/database/factories/MeetingImageFactory.php
@@ -23,7 +23,7 @@ class MeetingImageFactory extends Factory
     {
         return [
             'meeting_id' => rand(1, 10),
-            'image' => "/assets/img/avatar/avatar-sample02@2x.png",
+            'image' => '/assets/img/dummy/post-dummy01.jpg',
             'created_at' => $this->faker->dateTime,
             'updated_at' => $this->faker->dateTime,
         ];