diff --git a/Cargo.lock b/Cargo.lock
index 2b36c62..8bef8b3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -49,9 +49,9 @@ dependencies = [
 
 [[package]]
 name = "async-graphql"
-version = "1.16.5"
+version = "1.16.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db3846fd4346d044e86880734d4b8d1823f6a460c451a9c07df54ff88d99bb45"
+checksum = "a4131ebe2fa846763a6593cad00abb2c3e662fd4cd2d39aad644649dbcf8ebf3"
 dependencies = [
 "Inflector",
 "anyhow",
diff --git a/codegen-for-async-graphql-example/Cargo.toml b/codegen-for-async-graphql-example/Cargo.toml
index c23b55c..138b1db 100644
--- a/codegen-for-async-graphql-example/Cargo.toml
+++ b/codegen-for-async-graphql-example/Cargo.toml
@@ -10,5 +10,5 @@ repository = "https://github.com/atsuhiro/codegen-for-async-graphql"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-async-graphql = "1.15.14"
+async-graphql = "1.16.6"
 async-std = { version = "1.5.0", features = ["attributes"] }
diff --git a/codegen-for-async-graphql-example/src/models/object_type/create_friend_mutation_payload.rs b/codegen-for-async-graphql-example/src/models/object_type/create_friend_mutation_payload.rs
index e6242d4..7685618 100644
--- a/codegen-for-async-graphql-example/src/models/object_type/create_friend_mutation_payload.rs
+++ b/codegen-for-async-graphql-example/src/models/object_type/create_friend_mutation_payload.rs
@@ -6,6 +6,6 @@ pub struct CreateFriendMutationPayload {}
 #[Object]
 impl CreateFriendMutationPayload {
 pub async fn friend(&self, ctx: &Context<'_>) -> Friend {
- ctx.data::<datasource>().friend()
+ ctx.data_unchecked::<datasource>().friend()
 }
 }
diff --git a/codegen-for-async-graphql-example/src/models/object_type/friend_connection.rs b/codegen-for-async-graphql-example/src/models/object_type/friend_connection.rs
index fbfa271..913cf73 100644
--- a/codegen-for-async-graphql-example/src/models/object_type/friend_connection.rs
+++ b/codegen-for-async-graphql-example/src/models/object_type/friend_connection.rs
@@ -8,7 +8,7 @@ pub struct FriendConnection {
 #[Object]
 impl FriendConnection {
 pub async fn nodes(&self, ctx: &Context<'_>) -> Vec<friend> {
- ctx.data::<datasource>().nodes()
+ ctx.data_unchecked::<datasource>().nodes()
 }
 pub async fn total_count(&self) -> i32 {
 self.total_count.clone()
diff --git a/codegen-for-async-graphql-example/src/models/object_type/me.rs b/codegen-for-async-graphql-example/src/models/object_type/me.rs
index 20acdfb..12ca646 100644
--- a/codegen-for-async-graphql-example/src/models/object_type/me.rs
+++ b/codegen-for-async-graphql-example/src/models/object_type/me.rs
@@ -17,13 +17,13 @@ pub struct Me {
 #[Object]
 impl Me {
 pub async fn friends(&self, ctx: &Context<'_>, first: Option<i32>) -> FriendConnection {
- ctx.data::<datasource>().friends(first)
+ ctx.data_unchecked::<datasource>().friends(first)
 }
 pub async fn notifications(&self, ctx: &Context<'_>) -> Option<vec<notification>> {
- ctx.data::<datasource>().notifications()
+ ctx.data_unchecked::<datasource>().notifications()
 }
 pub async fn search(&self, ctx: &Context<'_>, text: String) -> Option<vec<searchresult>> {
- ctx.data::<datasource>().search(text)
+ ctx.data_unchecked::<datasource>().search(text)
 }
 pub async fn id(&self) -> ID {
 self.id.clone()
diff --git a/codegen-for-async-graphql-example/src/models/object_type/query.rs b/codegen-for-async-graphql-example/src/models/object_type/query.rs
index 4259f9c..ba7de95 100644
--- a/codegen-for-async-graphql-example/src/models/object_type/query.rs
+++ b/codegen-for-async-graphql-example/src/models/object_type/query.rs
@@ -9,7 +9,7 @@ pub struct Query {
 impl Query {
 #[field(desc = "\"me: Single-line comment\"")]
 pub async fn me(&self, ctx: &Context<'_>) -> Me {
- ctx.data::<datasource>().me()
+ ctx.data_unchecked::<datasource>().me()
 }
 pub async fn active(&self) -> bool {
 self.active.clone()
diff --git a/codegen-for-async-graphql-renderer/Cargo.toml b/codegen-for-async-graphql-renderer/Cargo.toml
index 0fb0ce3..b3a0347 100644
--- a/codegen-for-async-graphql-renderer/Cargo.toml
+++ b/codegen-for-async-graphql-renderer/Cargo.toml
@@ -14,7 +14,7 @@ categories = ["network-programming", "web-programming"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-async-graphql = "1.15.14"
+async-graphql = "1.16.6"
 async-graphql-parser = "1.14.2"
 proc-macro2 = { version = "1.0", default-features = false }
 quote = "1.0.7"
diff --git a/codegen-for-async-graphql-renderer/src/renderer/internal/field.rs b/codegen-for-async-graphql-renderer/src/renderer/internal/field.rs
index 1f4929e..dad5a9e 100644
--- a/codegen-for-async-graphql-renderer/src/renderer/internal/field.rs
+++ b/codegen-for-async-graphql-renderer/src/renderer/internal/field.rs
@@ -93,7 +93,7 @@ impl Renderer {
 quote!(
 #field
 pub async fn #n(&self, ctx: &Context<'_>, #arguments ) -> #ty {
- ctx.data::<datasource>().#n(#arguments_variebles)
+ ctx.data_unchecked::<datasource>().#n(#arguments_variebles)
 }
 )
 }
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