use tokio ~1.15
@@ -38,7 +38,7 @@ serde = { version = "1.0", features = [
serde_cbor = "0.11"
serde_json = "1.0"
simplelog = "0.10"
-tokio = { version = "1", features = [
+tokio = { version = "~1.15.0", features = [
"fs",
"io-util",
"macros",
