diff --git a/lightning-block-sync/Cargo.toml b/lightning-block-sync/Cargo.toml
index cbc81c89d93..54a5305e274 100644
--- a/lightning-block-sync/Cargo.toml
+++ b/lightning-block-sync/Cargo.toml
@@ -26,4 +26,4 @@ serde_json = { version = "1.0", optional = true }
 chunked_transfer = { version = "1.4", optional = true }
 
 [dev-dependencies]
-tokio = { version = "~1.14", features = [ "macros", "rt" ] }
+tokio = { version = "~1.21", features = [ "macros", "rt" ] }