diff --git a/backend/config/settings/aws.py b/backend/config/settings/aws.py
index e9279e4e..988d238d 100644
--- a/backend/config/settings/aws.py
+++ b/backend/config/settings/aws.py
@@ -8,6 +8,7 @@ AWS_ACCESS_KEY_ID = env("AWS_ACCESS_KEY_ID")
 AWS_SECRET_ACCESS_KEY = env("AWS_SECRET_ACCESS_KEY")
 AWS_S3_REGION_NAME = env("REGION_NAME", "us-west-1")
 AWS_STORAGE_BUCKET_NAME = env("BUCKET_NAME", "doccano")
+AWS_S3_ENDPOINT_URL = env("AWS_S3_ENDPOINT_URL", None)
 AWS_DEFAULT_ACL = "private"
 AWS_BUCKET_ACL = "private"
 AWS_AUTO_CREATE_BUCKET = True
diff --git a/frontend/domain/models/example/example.ts b/frontend/domain/models/example/example.ts
index f77dc070..23d4a168 100644
--- a/frontend/domain/models/example/example.ts
+++ b/frontend/domain/models/example/example.ts
@@ -11,8 +11,11 @@ export class ExampleItem {
   ) {}
 
   get url() {
-    const l = this.fileUrl.indexOf('media/')
-    return this.fileUrl.slice(l - 1)
+    const l = this.fileUrl.indexOf('/media/')
+    if (l < 0) {
+      return this.fileUrl
+    }
+    return this.fileUrl.slice(l)
   }
 }