diff --git a/Cargo.toml b/Cargo.toml
index e7b152a6..515be6c1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,13 +8,13 @@ license     = "Apache-2.0"
 name        = "casbin"
 readme      = "README.md"
 repository  = "https://github.com/casbin/casbin-rs"
-version     = "2.0.7"
+version     = "2.0.8"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 async-std   = { version = "1.9.0", optional = true }
-async-trait = "0.1.48"
+async-trait = "0.1.50"
 globset     = { version = "0.4.6", optional = true }
 indexmap    = "1.6.2"
 ip_network  = { version = "0.3.4", optional = true }
diff --git a/README.md b/README.md
index 465ef786..7abcc373 100644
--- a/README.md
+++ b/README.md
@@ -33,8 +33,8 @@ Add this package to `Cargo.toml` of your project. (Check https://crates.io/crate
 
 ```toml
 [dependencies]
-casbin = { version = "2.0.7", default-features = false, features = ["runtime-async-std", "logging", "incremental"] }
-tokio = { version = "1.4.0", features = ["fs", "io-util"] }
+casbin = { version = "2.0.8", default-features = false, features = ["runtime-async-std", "logging", "incremental"] }
+tokio = { version = "1.5.0", features = ["fs", "io-util"] }
 ```
 
 **Warning**: `tokio v1.0` or later is supported from `casbin v2.0.6`, we recommend that you upgrade the relevant components to ensure that they work properly. The last version that supports `tokio v0.2` is `casbin v2.0.5` , you can choose according to your needs.