diff --git a/packages/backend/native-utils/migration/src/lib.rs b/packages/backend/native-utils/migration/src/lib.rs
index 4835c2d3d7..94e2b08cc4 100644
--- a/packages/backend/native-utils/migration/src/lib.rs
+++ b/packages/backend/native-utils/migration/src/lib.rs
@@ -1,12 +1,16 @@
 pub use sea_orm_migration::prelude::*;
 
 mod m20230531_180824_drop_reversi;
+mod m20230627_185451_index_note_url;
 
 pub struct Migrator;
 
 #[async_trait::async_trait]
 impl MigratorTrait for Migrator {
     fn migrations() -> Vec<Box<dyn MigrationTrait>> {
-        vec![Box::new(m20230531_180824_drop_reversi::Migration)]
+        vec![
+            Box::new(m20230531_180824_drop_reversi::Migration),
+            Box::new(m20230627_185451_index_note_url::Migration),
+        ]
     }
 }
diff --git a/packages/backend/native-utils/migration/src/m20230627_185451_index_note_url.rs b/packages/backend/native-utils/migration/src/m20230627_185451_index_note_url.rs
new file mode 100644
index 0000000000..ceffed9c41
--- /dev/null
+++ b/packages/backend/native-utils/migration/src/m20230627_185451_index_note_url.rs
@@ -0,0 +1,38 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_index(
+                Index::create()
+                    .name("IDX_note_url")
+                    .table(Note::Table)
+                    .col(Note::Url)
+                    .if_not_exists()
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_index(
+                Index::drop()
+                    .name("IDX_note_url")
+                    .table(Note::Table)
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+/// Learn more at https://docs.rs/sea-query#iden
+#[derive(Iden)]
+enum Note {
+    Table,
+    Url,
+}
diff --git a/packages/backend/src/remote/activitypub/db-resolver.ts b/packages/backend/src/remote/activitypub/db-resolver.ts
index 44ff70c56c..6e448d4b17 100644
--- a/packages/backend/src/remote/activitypub/db-resolver.ts
+++ b/packages/backend/src/remote/activitypub/db-resolver.ts
@@ -80,8 +80,15 @@ export default class DbResolver {
 				id: parsed.id,
 			});
 		} else {
-			return await Notes.findOneBy({
-				uri: parsed.uri,
+			return await Notes.findOne({
+				where: [
+					{
+						uri: parsed.uri,
+					},
+					{
+						url: parsed.uri,
+					},
+				],
 			});
 		}
 	}