diff --git a/license_server/Cargo.toml b/license_server/Cargo.toml
index f5119ca..2b8a311 100644
--- a/license_server/Cargo.toml
+++ b/license_server/Cargo.toml
@@ -21,6 +21,7 @@ serde_json = { version = "1.0.115", features = ["raw_value"] }
 serde_qs = { version = "0.12.0", features = ["axum"] }
 serde_repr = "0.1.18"
 tokio = { version = "1.37.0", features = ["full"] }
+tokio-util = { version = "0.7.10", features = ["io", "io-util", "net", "rt", "full"] }
 tracing = { version = "0.1.40", features = ["attributes"] }
 tracing-appender = "0.2.3"
 tracing-error = "0.2.0"