diff --git a/Cargo.toml b/Cargo.toml
index 5c12dfa..cab7a7b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,4 +20,4 @@ syn = { version = "1.0", features = ["full"] }
 quote = "1.0"
 
 [dev-dependencies]
-async-std = "0.99.5"
+async-std = "1.9.0"