diff --git a/packages/backend/native-utils/Cargo.lock b/packages/backend/native-utils/Cargo.lock
index f2f3745b1..95d3e9af2 100644
--- a/packages/backend/native-utils/Cargo.lock
+++ b/packages/backend/native-utils/Cargo.lock
@@ -1305,6 +1305,7 @@ checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 name = "migration"
 version = "0.1.0"
 dependencies = [
+ "basen",
  "futures",
  "indicatif",
  "native-utils",
diff --git a/packages/backend/native-utils/migration/Cargo.toml b/packages/backend/native-utils/migration/Cargo.toml
index 32adb62c8..454d9bff4 100644
--- a/packages/backend/native-utils/migration/Cargo.toml
+++ b/packages/backend/native-utils/migration/Cargo.toml
@@ -10,11 +10,11 @@ path = "src/lib.rs"
 
 [features]
 default = []
-convert = ["dep:indicatif", "dep:futures"]
+convert = ["dep:native-utils", "dep:indicatif", "dep:futures"]
 
 [dependencies]
 serde_json = "1.0.96"
-native-utils = { path = "../" }
+native-utils = { path = "../", optional = true }
 indicatif = { version = "0.17.4", features = ["tokio"], optional = true }
 tokio = { version = "1.28.2", features = ["full"] }
 futures = { version = "0.3.28", optional = true }
@@ -24,6 +24,7 @@ urlencoding = "2.1.2"
 redis = { version = "0.23.0", features = ["tokio-rustls-comp"] }
 sea-orm = "0.11.3"
 url = { version = "2.4.0", features = ["serde"] }
+basen = "0.1.0"
 
 [dependencies.sea-orm-migration]
 version = "0.11.0"
diff --git a/packages/backend/native-utils/migration/src/lib.rs b/packages/backend/native-utils/migration/src/lib.rs
index dbe2ce1a0..57ca203f6 100644
--- a/packages/backend/native-utils/migration/src/lib.rs
+++ b/packages/backend/native-utils/migration/src/lib.rs
@@ -1,5 +1,7 @@
 pub use sea_orm_migration::prelude::*;
 
+use basen::BASE36;
+
 mod m20230531_180824_drop_reversi;
 mod m20230627_185451_index_note_url;
 mod m20230709_000510_move_antenna_to_cache;
@@ -18,3 +20,12 @@ impl MigratorTrait for Migrator {
         ]
     }
 }
+
+pub fn get_timestamp(id: &str) -> i64 {
+    const TIME_2000: i64 = 946_684_800_000;
+    let n: Option<u64> = BASE36.decode_var_len(&id[0..8]);
+    match n {
+        None => -1,
+        Some(n) => n as i64 + TIME_2000,
+    }
+}
diff --git a/packages/backend/native-utils/migration/src/m20230806_170616_fix_antenna_stream_ids.rs b/packages/backend/native-utils/migration/src/m20230806_170616_fix_antenna_stream_ids.rs
index ea23f4319..6d45b7613 100644
--- a/packages/backend/native-utils/migration/src/m20230806_170616_fix_antenna_stream_ids.rs
+++ b/packages/backend/native-utils/migration/src/m20230806_170616_fix_antenna_stream_ids.rs
@@ -1,9 +1,10 @@
 use std::env;
 
-use native_utils::util::id;
 use redis::Commands;
 use sea_orm_migration::prelude::*;
 
+use crate::get_timestamp;
+
 #[derive(DeriveMigrationName)]
 pub struct Migration;
 
@@ -31,7 +32,7 @@ impl MigrationTrait for Migration {
             let all_elems: Vec<Vec<Vec<String>>> = redis_conn.xrange_all(key).unwrap(); // Get all post IDs in stream
             let stream_ids = all_elems
                 .iter()
-                .map(|v| format!("{}-*", id::get_timestamp(&v[1][1]))); // Get correct stream id with timestamp
+                .map(|v| format!("{}-*", get_timestamp(&v[1][1]))); // Get correct stream id with timestamp
             redis_conn.del::<_, ()>(key).unwrap();
             for (j, v) in stream_ids.enumerate() {
                 redis_conn