diff --git a/axum-core/src/ext_traits/request.rs b/axum-core/src/ext_traits/request.rs
index fba5f2d6d9..1f8a59ea98 100644
--- a/axum-core/src/ext_traits/request.rs
+++ b/axum-core/src/ext_traits/request.rs
@@ -66,7 +66,7 @@ pub trait RequestExt: sealed::Sealed + Sized {
     ///     }
     /// }
     /// ```
-    fn extract<E, M>(self) -> impl Future<Output = Result<E, E::Rejection>>
+    fn extract<E, M>(self) -> impl Future<Output = Result<E, E::Rejection>> + Send
     where
         E: FromRequest<(), M> + 'static,
         M: 'static;
@@ -123,7 +123,7 @@ pub trait RequestExt: sealed::Sealed + Sized {
     fn extract_with_state<E, S, M>(
         self,
         state: &S,
-    ) -> impl Future<Output = Result<E, E::Rejection>>
+    ) -> impl Future<Output = Result<E, E::Rejection>> + Send
     where
         E: FromRequest<S, M> + 'static,
         S: Send + Sync;
@@ -176,7 +176,7 @@ pub trait RequestExt: sealed::Sealed + Sized {
     ///     }
     /// }
     /// ```
-    fn extract_parts<E>(&mut self) -> impl Future<Output = Result<E, E::Rejection>>
+    fn extract_parts<E>(&mut self) -> impl Future<Output = Result<E, E::Rejection>> + Send
     where
         E: FromRequestParts<()> + 'static;
 
@@ -244,7 +244,7 @@ pub trait RequestExt: sealed::Sealed + Sized {
     fn extract_parts_with_state<'a, E, S>(
         &'a mut self,
         state: &'a S,
-    ) -> impl Future<Output = Result<E, E::Rejection>> + 'a
+    ) -> impl Future<Output = Result<E, E::Rejection>> + Send + 'a
     where
         E: FromRequestParts<S> + 'static,
         S: Send + Sync;
diff --git a/axum-core/src/ext_traits/request_parts.rs b/axum-core/src/ext_traits/request_parts.rs
index 1246e2ca9e..7b3955dc0f 100644
--- a/axum-core/src/ext_traits/request_parts.rs
+++ b/axum-core/src/ext_traits/request_parts.rs
@@ -52,7 +52,7 @@ pub trait RequestPartsExt: sealed::Sealed + Sized {
     ///     }
     /// }
     /// ```
-    fn extract<E>(&mut self) -> impl Future<Output = Result<E, E::Rejection>> + '_
+    fn extract<E>(&mut self) -> impl Future<Output = Result<E, E::Rejection>> + Send + '_
     where
         E: FromRequestParts<()> + 'static;
 
@@ -108,7 +108,7 @@ pub trait RequestPartsExt: sealed::Sealed + Sized {
     fn extract_with_state<'a, E, S>(
         &'a mut self,
         state: &'a S,
-    ) -> impl Future<Output = Result<E, E::Rejection>> + 'a
+    ) -> impl Future<Output = Result<E, E::Rejection>> + Send + 'a
     where
         E: FromRequestParts<S> + 'static,
         S: Send + Sync;
diff --git a/examples/error-handling-and-dependency-injection/src/main.rs b/examples/error-handling-and-dependency-injection/src/main.rs
index fdfa1b7f31..457b764d66 100644
--- a/examples/error-handling-and-dependency-injection/src/main.rs
+++ b/examples/error-handling-and-dependency-injection/src/main.rs
@@ -125,10 +125,13 @@ type DynUserRepo = Arc<dyn UserRepo + Send + Sync>;
 /// A trait that defines things a user repo might support.
 trait UserRepo {
     /// Loop up a user by their id.
-    fn find(&self, user_id: Uuid) -> impl Future<Output = Result<User, UserRepoError>>;
+    fn find(&self, user_id: Uuid) -> impl Future<Output = Result<User, UserRepoError>> + Send;
 
     /// Create a new user.
-    fn create(&self, params: CreateUser) -> impl Future<Output = Result<User, UserRepoError>>;
+    fn create(
+        &self,
+        params: CreateUser,
+    ) -> impl Future<Output = Result<User, UserRepoError>> + Send;
 }
 
 #[derive(Debug, Serialize)]