diff --git a/engine/Cargo.toml b/engine/Cargo.toml
index 43489a8..15addf3 100644
--- a/engine/Cargo.toml
+++ b/engine/Cargo.toml
@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+once_cell = "1.19"
\ No newline at end of file