diff --git a/Cargo.toml b/Cargo.toml
index af969b3..419cdc0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,10 @@ name = "holiday_api_rust"
 version = "0.3.2"
 authors = ["Guilherme Branco Stracini <guilherme@guilhermebranco.com.br>"]
 edition = "2018"
+reqwest = { version = "0.11", features = ["json"] }
+tokio = { version = "1", features = ["full"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 description = "The Holiday API client wrapper."
 repository = "https://github.com/guibranco/holiday-api-rust.git"
 homepage = "https://github.com/guibranco/holiday-api-rust"