diff --git a/Cargo.toml b/Cargo.toml
index 6d11951..3baab6e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,15 +6,16 @@ homepage    = "https://github.com/casbin-rs/diesel-adapter"
 license     = "Apache-2.0"
 name        = "diesel-adapter"
 readme      = "README.md"
-version     = "0.8.3"
+version     = "0.9.0"
 
 [dependencies]
-async-std   = { version = "1.8.0", default-features = false, optional = true }
-async-trait = "0.1.40"
-casbin      = { version = "~2.0.5", default-features = false }
+async-std   = { version = "1.9.0", default-features = false, optional = true }
+async-trait = "0.1.42"
+casbin      = { version = "2.0.6", default-features = false }
 diesel      = { version = "1.4.5", default-features = false, features = ["r2d2"] }
-futures     = "~0.3"
-tokio       = { version = "~0.2.22", default-features = false, optional = true }
+futures     = "0.3"
+tokio       = { version = "1.1.1", default-features = false, optional = true }
+once_cell = "1.5.2"
 
 [features]
 default = ["postgres", "runtime-tokio"]
@@ -24,8 +25,8 @@ postgres = ["diesel/postgres"]
 sqlite   = ["diesel/sqlite"]
 
 runtime-async-std = ["casbin/runtime-async-std", "async-std/unstable"]
-runtime-tokio     = ["casbin/runtime-tokio", "tokio/blocking", "tokio/rt-core"]
+runtime-tokio     = ["casbin/runtime-tokio", "tokio/rt"]
 
 [dev-dependencies]
-async-std = { version = "1.8.0", features = ["attributes"] }
-tokio     = { version = "~0.2.22", features = ["full"] }
+async-std = { version = "1.9.0", features = ["attributes"] }
+tokio     = { version = "1.1.1", features = ["full"] }
diff --git a/README.md b/README.md
index 1b944e6..801fe74 100644
--- a/README.md
+++ b/README.md
@@ -11,16 +11,25 @@ Based on [Diesel](https://github.com/diesel-rs/diesel), The current supported da
 
 - [Mysql](https://www.mysql.com/)
 - [Postgres](https://github.com/lib/pq)
+- [SQLite](https://www.sqlite.org)
 
+## Notice
+In order to unify the database table name in Casbin ecosystem, we decide to use `casbin_rule` instead of `casbin_rules` from version `0.9.0`. If you are using old version `diesel-adapter` in your production environment, please use following command and update `diesel-adapter` version:
+
+````SQL
+# MySQL & PostgreSQL & SQLite
+ALTER TABLE casbin_rules RENAME TO casbin_rule;
+````
 
 ## Install
 
 Add it to `Cargo.toml`
 
 ```
-diesel-adapter = { version = "0.8.3", features = ["postgres"] }
-async-std = "1.8.0"
+diesel-adapter = { version = "0.9.0", features = ["postgres"] }
+tokio = "1.1.1"
 ```
+**Warning**: `tokio v1.0` or later is supported from `diesel-adapter v0.9.0`, we recommend that you upgrade the relevant components to ensure that they work properly. The last version that supports `tokio v0.2` is `diesel-adapter v0.8.3` , you can choose according to your needs.
 
 ## Example
 
diff --git a/src/actions.rs b/src/actions.rs
index 19bb753..0b84558 100644
--- a/src/actions.rs
+++ b/src/actions.rs
@@ -97,7 +97,7 @@ pub fn new(conn: Result<Pool>) -> Result<usize> {
 }
 
 pub fn remove_policy(conn: Pool, pt: &str, rule: Vec<String>) -> Result<bool> {
-    use schema::casbin_rules::dsl::*;
+    use schema::casbin_rule::dsl::*;
 
     let rule = normalize_casbin_rule(rule, 0);
 
@@ -110,14 +110,14 @@ pub fn remove_policy(conn: Pool, pt: &str, rule: Vec<String>) -> Result<bool> {
         .and(v4.eq(&rule[4]))
         .and(v5.eq(&rule[5]));
 
-    diesel::delete(casbin_rules.filter(filter))
+    diesel::delete(casbin_rule.filter(filter))
         .execute(&conn)
         .map(|n| n == 1)
         .map_err(|err| AdapterError(Box::new(Error::DieselError(err))).into())
 }
 
 pub fn remove_policies(conn: Pool, pt: &str, rules: Vec<Vec<String>>) -> Result<bool> {
-    use schema::casbin_rules::dsl::*;
+    use schema::casbin_rule::dsl::*;
 
     conn.transaction::<_, DieselError, _>(|| {
         for rule in rules {
@@ -132,7 +132,7 @@ pub fn remove_policies(conn: Pool, pt: &str, rules: Vec<Vec<String>>) -> Result<
                 .and(v4.eq(&rule[4]))
                 .and(v5.eq(&rule[5]));
 
-            match diesel::delete(casbin_rules.filter(filter)).execute(&conn) {
+            match diesel::delete(casbin_rule.filter(filter)).execute(&conn) {
                 Ok(n) if n == 1 => continue,
                 _ => return Err(DieselError::RollbackTransaction),
             }
@@ -149,16 +149,16 @@ pub fn remove_filtered_policy(
     field_index: usize,
     field_values: Vec<String>,
 ) -> Result<bool> {
-    use schema::casbin_rules::dsl::*;
+    use schema::casbin_rule::dsl::*;
 
     let field_values = normalize_casbin_rule(field_values, field_index);
 
     let boxed_query = if field_index == 5 {
-        diesel::delete(casbin_rules.filter(ptype.eq(pt).and(eq_empty!(&field_values[0], v5))))
+        diesel::delete(casbin_rule.filter(ptype.eq(pt).and(eq_empty!(&field_values[0], v5))))
             .into_boxed()
     } else if field_index == 4 {
         diesel::delete(
-            casbin_rules.filter(
+            casbin_rule.filter(
                 ptype
                     .eq(pt)
                     .and(eq_empty!(&field_values[0], v4))
@@ -168,7 +168,7 @@ pub fn remove_filtered_policy(
         .into_boxed()
     } else if field_index == 3 {
         diesel::delete(
-            casbin_rules.filter(
+            casbin_rule.filter(
                 ptype
                     .eq(pt)
                     .and(eq_empty!(&field_values[0], v3))
@@ -179,7 +179,7 @@ pub fn remove_filtered_policy(
         .into_boxed()
     } else if field_index == 2 {
         diesel::delete(
-            casbin_rules.filter(
+            casbin_rule.filter(
                 ptype
                     .eq(pt)
                     .and(eq_empty!(&field_values[0], v2))
@@ -191,7 +191,7 @@ pub fn remove_filtered_policy(
         .into_boxed()
     } else if field_index == 1 {
         diesel::delete(
-            casbin_rules.filter(
+            casbin_rule.filter(
                 ptype
                     .eq(pt)
                     .and(eq_empty!(&field_values[0], v1))
@@ -204,7 +204,7 @@ pub fn remove_filtered_policy(
         .into_boxed()
     } else {
         diesel::delete(
-            casbin_rules.filter(
+            casbin_rule.filter(
                 ptype
                     .eq(pt)
                     .and(eq_empty!(&field_values[0], v0))
@@ -225,22 +225,22 @@ pub fn remove_filtered_policy(
 }
 
 pub(crate) fn clear_policy(conn: Pool) -> Result<()> {
-    use schema::casbin_rules::dsl::casbin_rules;
-    diesel::delete(casbin_rules)
+    use schema::casbin_rule::dsl::casbin_rule;
+    diesel::delete(casbin_rule)
         .execute(&conn)
         .map(|_| ())
         .map_err(|err| AdapterError(Box::new(Error::DieselError(err))).into())
 }
 
 pub(crate) fn save_policy(conn: Pool, rules: Vec<NewCasbinRule>) -> Result<()> {
-    use schema::casbin_rules::dsl::casbin_rules;
+    use schema::casbin_rule::dsl::casbin_rule;
 
     conn.transaction::<_, DieselError, _>(|| {
-        if diesel::delete(casbin_rules).execute(&conn).is_err() {
+        if diesel::delete(casbin_rule).execute(&conn).is_err() {
             return Err(DieselError::RollbackTransaction);
         }
 
-        diesel::insert_into(casbin_rules)
+        diesel::insert_into(casbin_rule)
             .values(&rules)
             .execute(&*conn)
             .and_then(|n| {
@@ -256,17 +256,17 @@ pub(crate) fn save_policy(conn: Pool, rules: Vec<NewCasbinRule>) -> Result<()> {
 }
 
 pub(crate) fn load_policy(conn: Pool) -> Result<Vec<CasbinRule>> {
-    use schema::casbin_rules::dsl::casbin_rules;
+    use schema::casbin_rule::dsl::casbin_rule;
 
-    casbin_rules
+    casbin_rule
         .load::<CasbinRule>(&conn)
         .map_err(|err| AdapterError(Box::new(Error::DieselError(err))).into())
 }
 
 pub(crate) fn add_policy(conn: Pool, new_rule: NewCasbinRule) -> Result<bool> {
-    use schema::casbin_rules::dsl::casbin_rules;
+    use schema::casbin_rule::dsl::casbin_rule;
 
-    diesel::insert_into(casbin_rules)
+    diesel::insert_into(casbin_rule)
         .values(&new_rule)
         .execute(&conn)
         .map(|n| n == 1)
@@ -274,10 +274,10 @@ pub(crate) fn add_policy(conn: Pool, new_rule: NewCasbinRule) -> Result<bool> {
 }
 
 pub(crate) fn add_policies(conn: Pool, new_rules: Vec<NewCasbinRule>) -> Result<bool> {
-    use schema::casbin_rules::dsl::casbin_rules;
+    use schema::casbin_rule::dsl::casbin_rule;
 
     conn.transaction::<_, DieselError, _>(|| {
-        diesel::insert_into(casbin_rules)
+        diesel::insert_into(casbin_rule)
             .values(&new_rules)
             .execute(&*conn)
             .and_then(|n| {
diff --git a/src/adapter.rs b/src/adapter.rs
index 62e93d6..b3d73b6 100644
--- a/src/adapter.rs
+++ b/src/adapter.rs
@@ -20,7 +20,7 @@ pub struct DieselAdapter {
     is_filtered: bool,
 }
 
-pub const TABLE_NAME: &str = "casbin_rules";
+pub const TABLE_NAME: &str = "casbin_rule";
 
 impl DieselAdapter {
     pub fn new<U: Into<String>>(url: U, pool_size: u32) -> Result<Self> {
diff --git a/src/models.rs b/src/models.rs
index ecd61b2..fdc06e2 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -1,6 +1,7 @@
-use super::schema::casbin_rules;
+use super::schema::casbin_rule;
 
 #[derive(Queryable, Identifiable)]
+#[table_name = "casbin_rule"]
 pub(crate) struct CasbinRule {
     pub id: i32,
     pub ptype: String,
@@ -13,7 +14,7 @@ pub(crate) struct CasbinRule {
 }
 
 #[derive(Insertable, Clone)]
-#[table_name = "casbin_rules"]
+#[table_name = "casbin_rule"]
 pub(crate) struct NewCasbinRule {
     pub ptype: String,
     pub v0: String,
diff --git a/src/schema.rs b/src/schema.rs
index 1d333be..fd137b1 100644
--- a/src/schema.rs
+++ b/src/schema.rs
@@ -1,5 +1,5 @@
 table! {
-    casbin_rules (id) {
+    casbin_rule (id) {
         id -> Integer,
         ptype -> Varchar,
         v0 -> Varchar,