diff --git a/src/context/mod.rs b/src/context/mod.rs
index 0726c0b..7c99a63 100644
--- a/src/context/mod.rs
+++ b/src/context/mod.rs
@@ -375,8 +375,8 @@ pub trait ContextSideEffects<'ctx>: private::SealedContext<'ctx> {
     #[must_use]
     fn run<R, F, T>(&self, run_closure: R) -> impl RunFuture<Result<T, TerminalError>> + 'ctx
     where
-        R: RunClosure<Fut = F, Output = T> + Send + Sync + 'ctx,
-        F: Future<Output = HandlerResult<T>> + Send + Sync + 'ctx,
+        R: RunClosure<Fut = F, Output = T> + Send + 'ctx,
+        F: Future<Output = HandlerResult<T>> + Send + 'ctx,
         T: Serialize + Deserialize + 'static,
     {
         self.inner_context().run(run_closure)
diff --git a/src/endpoint/context.rs b/src/endpoint/context.rs
index 33de131..536dcb5 100644
--- a/src/endpoint/context.rs
+++ b/src/endpoint/context.rs
@@ -530,10 +530,10 @@ impl ContextInternal {
     pub fn run<'a, Run, Fut, Out>(
         &'a self,
         run_closure: Run,
-    ) -> impl crate::context::RunFuture<Result<Out, TerminalError>> + Send + Sync + 'a
+    ) -> impl crate::context::RunFuture<Result<Out, TerminalError>> + Send + 'a
     where
-        Run: RunClosure<Fut = Fut, Output = Out> + Send + Sync + 'a,
-        Fut: Future<Output = HandlerResult<Out>> + Send + Sync + 'a,
+        Run: RunClosure<Fut = Fut, Output = Out> + Send + 'a,
+        Fut: Future<Output = HandlerResult<Out>> + Send + 'a,
         Out: Serialize + Deserialize + 'static,
     {
         let this = Arc::clone(&self.inner);
@@ -634,8 +634,8 @@ impl<Run, Fut, Ret> RunFuture<Run, Fut, Ret> {
 impl<Run, Fut, Out> crate::context::RunFuture<Result<Result<Out, TerminalError>, Error>>
     for RunFuture<Run, Fut, Out>
 where
-    Run: RunClosure<Fut = Fut, Output = Out> + Send + Sync,
-    Fut: Future<Output = HandlerResult<Out>> + Send + Sync,
+    Run: RunClosure<Fut = Fut, Output = Out> + Send,
+    Fut: Future<Output = HandlerResult<Out>> + Send,
     Out: Serialize + Deserialize,
 {
     fn retry_policy(mut self, retry_policy: RunRetryPolicy) -> Self {
@@ -657,9 +657,9 @@ where
 
 impl<Run, Fut, Out> Future for RunFuture<Run, Fut, Out>
 where
-    Run: RunClosure<Fut = Fut, Output = Out> + Send + Sync,
+    Run: RunClosure<Fut = Fut, Output = Out> + Send,
     Out: Serialize + Deserialize,
-    Fut: Future<Output = HandlerResult<Out>> + Send + Sync,
+    Fut: Future<Output = HandlerResult<Out>> + Send,
 {
     type Output = Result<Result<Out, TerminalError>, Error>;