diff --git a/src/lib.rs b/src/lib.rs
index 15d0223..5aefa71 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,6 +9,6 @@ pub mod task;
 
 pub use task::{spawn, spawn_blocking};
 
-pub fn block_on<T>(future: impl std::future::Future<Output = T> + Send + 'static) -> T {
+pub fn block_on<T>(future: impl std::future::Future<Output = T>) -> T {
     runtime::Runtime::new().block_on(future)
 }
diff --git a/src/runtime.rs b/src/runtime.rs
index daf5fe3..6dca29c 100644
--- a/src/runtime.rs
+++ b/src/runtime.rs
@@ -179,7 +179,7 @@ impl Runtime {
         &self.runtime_handle
     }
 
-    pub fn block_on<T>(&self, future: impl Future<Output = T> + Send + 'static) -> T {
+    pub fn block_on<T>(&self, future: impl Future<Output = T>) -> T {
         self.handle().block_on(future)
     }