diff --git a/examples/warp_async/Cargo.toml b/examples/warp_async/Cargo.toml
index 1891ad97..c33445e8 100644
--- a/examples/warp_async/Cargo.toml
+++ b/examples/warp_async/Cargo.toml
@@ -7,11 +7,13 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-juniper = { git = "https://github.com/graphql-rust/juniper", branch = "async-await", features = ["async"] }
-juniper_warp = { git = "https://github.com/graphql-rust/juniper", branch = "async-await", features = ["async"] }
 log = "0.4.8"
 env_logger = "0.6.2"
 warp = "0.1.19"
 futures-preview = { version = "0.3.0-alpha.18", features = ["nightly", "async-await", "compat"] }
 reqwest = "0.9.19"
 
+juniper_codegen = { git = "https://github.com/graphql-rust/juniper", branch = "async-await", features = ["async"] }
+juniper = { git = "https://github.com/graphql-rust/juniper", branch = "async-await", features = ["async"] }
+juniper_warp = { git = "https://github.com/graphql-rust/juniper", branch = "async-await", features = ["async"] }
+
diff --git a/examples/warp_async/src/main.rs b/examples/warp_async/src/main.rs
index 70112bae..170d743b 100644
--- a/examples/warp_async/src/main.rs
+++ b/examples/warp_async/src/main.rs
@@ -13,8 +13,16 @@ struct Context {
 }
 impl juniper::Context for Context {}
 
+#[derive(juniper::GraphQLEnum, Clone, Copy)]
+enum UserKind {
+    Admin,
+    User,
+    Guest,
+}
+
 struct User {
     id: i32,
+    kind: UserKind,
     name: String,
 }
 
@@ -24,6 +32,10 @@ impl User {
         self.id
     }
 
+    fn kind(&self) -> UserKind {
+        self.kind
+    }
+
     fn name(&self) -> &str {
         &self.name
     }
@@ -41,6 +53,7 @@ impl Query {
         vec![
             User{
                 id: 1,
+                kind: UserKind::Admin,
                 name: "user1".into(),
             },
         ]
diff --git a/juniper/src/lib.rs b/juniper/src/lib.rs
index 95ce987b..a6671054 100644
--- a/juniper/src/lib.rs
+++ b/juniper/src/lib.rs
@@ -90,6 +90,7 @@ Juniper has not reached 1.0 yet, thus some API instability should be expected.
 */
 #![doc(html_root_url = "https://docs.rs/juniper/0.14.0")]
 #![warn(missing_docs)]
+
 #![cfg_attr(feature = "async", feature(async_await, async_closure))]
 
 #[doc(hidden)]