diff --git a/clients/Rust/Cargo.toml b/clients/Rust/Cargo.toml
index 833ee59..2eb3e45 100644
--- a/clients/Rust/Cargo.toml
+++ b/clients/Rust/Cargo.toml
@@ -7,4 +7,5 @@ edition = "2018"
 model = { path = "model", package = "aicup2020-model" }
 trans = "0.4.0-alpha.3"
 rand = "0.7.3"
-chrono = "0.4.19"
\ No newline at end of file
+chrono = "0.4.19"
+itertools = "0.9.0"