diff --git a/Cargo.lock b/Cargo.lock
index 156e3d146..84c9c7a19 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2191,7 +2191,6 @@ dependencies = [
  "bytemuck",
  "byteorder",
  "rayon",
- "tempfile",
 ]
 
 [[package]]
diff --git a/milli/Cargo.toml b/milli/Cargo.toml
index fd7bde99b..53ae63f8e 100644
--- a/milli/Cargo.toml
+++ b/milli/Cargo.toml
@@ -27,8 +27,7 @@ fst = "0.4.7"
 fxhash = "0.2.1"
 geoutils = "0.5.1"
 grenad = { version = "0.4.6", default-features = false, features = [
-    "rayon",
-    "tempfile",
+    "rayon"
 ] }
 heed = { version = "0.20.1", default-features = false, features = [
     "serde-json",
diff --git a/milli/src/update/index_documents/mod.rs b/milli/src/update/index_documents/mod.rs
index 089b56025..eb69bd188 100644
--- a/milli/src/update/index_documents/mod.rs
+++ b/milli/src/update/index_documents/mod.rs
@@ -325,7 +325,7 @@ where
         let documents_chunk_size = match self.indexer_config.documents_chunk_size {
             Some(chunk_size) => chunk_size,
             None => {
-                let default_chunk_size = 1024 * 1024 * 4; // 4MiB
+                let default_chunk_size = 1024 * 1024 * 1024 * 2; // 2 GiB
                 let min_chunk_size = 1024 * 512; // 512KiB
 
                 // compute the chunk size from the number of available threads and the inputed data size.