diff --git a/Cargo.toml b/Cargo.toml
index a0ee5e8..da325d6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@
 edition = "2018"
 build = "build.rs"
 name = "ton_types"
-version = "1.10.3"
+version = "1.10.4"
 
 [dependencies]
 lockfree = { git = "https://github.com/tonlabs/lockfree.git" }
diff --git a/src/cells_serialization.rs b/src/cells_serialization.rs
index b6b6ec6..5150bed 100644
--- a/src/cells_serialization.rs
+++ b/src/cells_serialization.rs
@@ -245,8 +245,8 @@ impl BagOfCells {
                     
                     for i in 0..cell.references_count() {
                         let child = cell.reference(i).unwrap();
-                        let child_index = hashes_to_indexes[&child.repr_hash()] as usize;
-                        assert!(child_index > cell_index);
+                        let child_index = hashes_to_indexes[&child.repr_hash()] as u64;
+                        assert!(child_index > cell_index as u64);
                         dest.write_all(&(child_index).to_be_bytes()[(8-ref_size)..8])?;
                     }
                 }