diff --git a/Cargo.lock b/Cargo.lock
index 575f582bc..e3c00257d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -961,6 +961,7 @@ dependencies = [
  "askama_warp",
  "byte-unit",
  "bytes 0.5.6",
+ "crossbeam-channel",
  "either",
  "flate2",
  "fst",
@@ -1365,7 +1366,6 @@ dependencies = [
  "bstr",
  "byteorder",
  "chrono",
- "crossbeam-channel",
  "csv",
  "either",
  "flate2",
diff --git a/http-ui/Cargo.toml b/http-ui/Cargo.toml
index de95ce3a6..970d1d9bf 100644
--- a/http-ui/Cargo.toml
+++ b/http-ui/Cargo.toml
@@ -8,6 +8,7 @@ edition = "2018"
 [dependencies]
 anyhow = "1.0.38"
 byte-unit = { version = "4.0.9", default-features = false, features = ["std"] }
+crossbeam-channel = "0.5.0"
 grenad = { git = "https://github.com/Kerollmops/grenad.git", rev = "3adcb26" }
 heed = "0.10.6"
 meilisearch-tokenizer = { git = "https://github.com/meilisearch/Tokenizer.git", tag = "v0.2.2" }
diff --git a/http-ui/src/main.rs b/http-ui/src/main.rs
index b6a894373..1f91e6370 100644
--- a/http-ui/src/main.rs
+++ b/http-ui/src/main.rs
@@ -1,3 +1,5 @@
+mod update_store;
+
 use std::{io, mem};
 use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::fmt::Display;
@@ -29,10 +31,12 @@ use tokio::sync::broadcast;
 use warp::{Filter, http::Response};
 use warp::filters::ws::Message;
 
-use milli::{FilterCondition, Index, MatchingWords, obkv_to_json, SearchResult, UpdateStore};
+use milli::{FilterCondition, Index, MatchingWords, obkv_to_json, SearchResult};
 use milli::update::{IndexDocumentsMethod, Setting, UpdateBuilder, UpdateFormat};
 use milli::update::UpdateIndexingStep::*;
 
+use self::update_store::UpdateStore;
+
 static GLOBAL_THREAD_POOL: OnceCell<ThreadPool> = OnceCell::new();
 
 #[derive(Debug, StructOpt)]
diff --git a/milli/src/update_store.rs b/http-ui/src/update_store.rs
similarity index 99%
rename from milli/src/update_store.rs
rename to http-ui/src/update_store.rs
index 7211a6293..122ee6031 100644
--- a/milli/src/update_store.rs
+++ b/http-ui/src/update_store.rs
@@ -1,3 +1,5 @@
+#![allow(unused)]
+
 use std::path::Path;
 use std::sync::Arc;
 
@@ -6,7 +8,7 @@ use heed::types::{OwnedType, DecodeIgnore, SerdeJson, ByteSlice};
 use heed::{EnvOpenOptions, Env, Database};
 use serde::{Serialize, Deserialize};
 
-use crate::BEU64;
+pub type BEU64 = heed::zerocopy::U64<heed::byteorder::BE>;
 
 #[derive(Clone)]
 pub struct UpdateStore<M, N> {
diff --git a/milli/Cargo.toml b/milli/Cargo.toml
index abcded8c9..3e755d088 100644
--- a/milli/Cargo.toml
+++ b/milli/Cargo.toml
@@ -9,7 +9,6 @@ anyhow = "1.0.38"
 bstr = "0.2.15"
 byteorder = "1.4.2"
 chrono = { version = "0.4.19", features = ["serde"] }
-crossbeam-channel = "0.5.0"
 csv = "1.1.5"
 either = "1.6.1"
 flate2 = "1.0.20"
diff --git a/milli/src/lib.rs b/milli/src/lib.rs
index 39e107073..8c1ed514c 100644
--- a/milli/src/lib.rs
+++ b/milli/src/lib.rs
@@ -4,7 +4,6 @@ mod criterion;
 mod external_documents_ids;
 mod fields_ids_map;
 mod search;
-mod update_store;
 pub mod facet;
 pub mod heed_codec;
 pub mod index;
@@ -29,7 +28,6 @@ pub use self::heed_codec::{RoaringBitmapLenCodec, BoRoaringBitmapLenCodec, CboRo
 pub use self::index::Index;
 pub use self::search::{Search, FacetDistribution, FilterCondition, SearchResult, MatchingWords};
 pub use self::tree_level::TreeLevel;
-pub use self::update_store::UpdateStore;
 
 pub type FastMap4<K, V> = HashMap<K, V, BuildHasherDefault<FxHasher32>>;
 pub type FastMap8<K, V> = HashMap<K, V, BuildHasherDefault<FxHasher64>>;