diff --git a/milli/src/update/index_documents/mod.rs b/milli/src/update/index_documents/mod.rs
index 8fc35b654..e7143bde0 100644
--- a/milli/src/update/index_documents/mod.rs
+++ b/milli/src/update/index_documents/mod.rs
@@ -263,6 +263,8 @@ pub struct IndexDocuments<'t, 'u, 'i, 'a> {
     facet_min_level_size: Option<NonZeroUsize>,
     words_prefix_threshold: Option<f64>,
     max_prefix_length: Option<usize>,
+    words_positions_level_group_size: Option<NonZeroUsize>,
+    words_positions_min_level_size: Option<NonZeroUsize>,
     update_method: IndexDocumentsMethod,
     update_format: UpdateFormat,
     autogenerate_docids: bool,
@@ -290,6 +292,8 @@ impl<'t, 'u, 'i, 'a> IndexDocuments<'t, 'u, 'i, 'a> {
             facet_min_level_size: None,
             words_prefix_threshold: None,
             max_prefix_length: None,
+            words_positions_level_group_size: None,
+            words_positions_min_level_size: None,
             update_method: IndexDocumentsMethod::ReplaceDocuments,
             update_format: UpdateFormat::Json,
             autogenerate_docids: true,
@@ -740,6 +744,19 @@ impl<'t, 'u, 'i, 'a> IndexDocuments<'t, 'u, 'i, 'a> {
         }
         builder.execute()?;
 
+        // Run the words level positions update operation.
+        let mut builder = WordsLevelPositions::new(self.wtxn, self.index, self.update_id);
+        builder.chunk_compression_type = self.chunk_compression_type;
+        builder.chunk_compression_level = self.chunk_compression_level;
+        builder.chunk_fusing_shrink_size = self.chunk_fusing_shrink_size;
+        if let Some(value) = self.words_positions_level_group_size {
+            builder.level_group_size(value);
+        }
+        if let Some(value) = self.words_positions_min_level_size {
+            builder.min_level_size(value);
+        }
+        builder.execute()?;
+
         debug_assert_eq!(database_count, total_databases);
 
         info!("Transform output indexed in {:.02?}", before_indexing.elapsed());
diff --git a/milli/src/update/update_builder.rs b/milli/src/update/update_builder.rs
index c966f72d2..9a4fb850e 100644
--- a/milli/src/update/update_builder.rs
+++ b/milli/src/update/update_builder.rs
@@ -2,7 +2,10 @@ use grenad::CompressionType;
 use rayon::ThreadPool;
 
 use crate::Index;
-use super::{ClearDocuments, DeleteDocuments, IndexDocuments, Settings, Facets, WordsPrefixes};
+use super::{
+    ClearDocuments, DeleteDocuments, IndexDocuments, Settings,
+    Facets, WordsPrefixes, WordsLevelPositions,
+};
 
 pub struct UpdateBuilder<'a> {
     pub(crate) log_every_n: Option<usize>,
@@ -150,4 +153,19 @@ impl<'a> UpdateBuilder<'a> {
 
         builder
     }
+
+    pub fn words_level_positions<'t, 'u, 'i>(
+        self,
+        wtxn: &'t mut heed::RwTxn<'i, 'u>,
+        index: &'i Index,
+    ) -> WordsLevelPositions<'t, 'u, 'i>
+    {
+        let mut builder = WordsLevelPositions::new(wtxn, index, self.update_id);
+
+        builder.chunk_compression_type = self.chunk_compression_type;
+        builder.chunk_compression_level = self.chunk_compression_level;
+        builder.chunk_fusing_shrink_size = self.chunk_fusing_shrink_size;
+
+        builder
+    }
 }