diff --git a/Cargo.toml b/Cargo.toml
index 765daa1..35f3296 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ warp = { version = "^0.3", default-features = false, features = ["compression",
 structopt = { version = "^0.3", features = ["wrap_help"] }
 toml = "^0.5"
 serde = { version = "^1.0", features = ["derive"] }
-tokio = { version = "^1.0", features = ["rt-multi-thread", "macros", ] }
+tokio = { version = "^1.0", features = ["rt-multi-thread", "macros", "sync"] }
 
 [features]
 default = ["sqlite"]