diff --git a/protocols/ping/src/dial_layer.rs b/protocols/ping/src/dial_layer.rs
index 57e536c6..8118cef8 100644
--- a/protocols/ping/src/dial_layer.rs
+++ b/protocols/ping/src/dial_layer.rs
@@ -50,7 +50,7 @@ impl<TSubstream> Default for PeriodicPingBehaviour<TSubstream> {
 
 impl<TSubstream> NetworkBehavior for PeriodicPingBehaviour<TSubstream>
 where
-    TSubstream: AsyncRead + AsyncWrite + Send + Sync + 'static,
+    TSubstream: AsyncRead + AsyncWrite,
 {
     type ProtocolsHandler = PeriodicPingHandler<TSubstream>;
     type OutEvent = Void;
diff --git a/protocols/ping/src/listen_layer.rs b/protocols/ping/src/listen_layer.rs
index a69e8e4d..b8da169b 100644
--- a/protocols/ping/src/listen_layer.rs
+++ b/protocols/ping/src/listen_layer.rs
@@ -50,7 +50,7 @@ impl<TSubstream> Default for PingListenBehaviour<TSubstream> {
 
 impl<TSubstream> NetworkBehavior for PingListenBehaviour<TSubstream>
 where
-    TSubstream: AsyncRead + AsyncWrite + Send + Sync + 'static,
+    TSubstream: AsyncRead + AsyncWrite,
 {
     type ProtocolsHandler = PingListenHandler<TSubstream>;
     type OutEvent = Void;