--- a/rust/Cargo.toml	Wed Sep 04 23:24:13 2019 +0800
+++ b/rust/Cargo.toml	Sun Sep 22 20:35:40 2019 +0800
@@ -5,23 +5,25 @@
 edition = "2018"
 
 [dependencies]
-serde = "1.0"
-serde_derive = "1.0"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 rand = "0.7"
 log = "0.4"
 env_logger = "0.6"
-docopt = "1.1"
-#rustc-serialize = "0.3"
-#time = "0.1"
+chrono = "0.4"
 lazy_static = "1.3"
 regex = "1.2"
-toml = "0.5"
-hyper = "0.12"
-serde_json = "0.9"
 base64 = "0.4"
 libc = "0.2"
 atomicwrites = "0.2"
 riker = "0.3"
+structopt = "0.3"
+config = "0.9"
+
+# alpha for async
+hyper = "=0.13.0-alpha.1"
+futures-preview = "=0.3.0-alpha.18"
+futures-util-preview = "=0.3.0-alpha.18"
 
 [target.'cfg(target_os = "linux")'.dependencies]
 sysfs_gpio = "0.5"