diff --git a/core/src/rpc_service.rs b/core/src/rpc_service.rs
index 0411510f1b..5f07cf91a1 100644
--- a/core/src/rpc_service.rs
+++ b/core/src/rpc_service.rs
@@ -287,7 +287,7 @@ impl JsonRpcService {
                         genesis_hash,
                     },
                 )
-                .threads(4)
+                .threads(num_cpus::get())
                 .cors(DomainsValidation::AllowOnly(vec![
                     AccessControlAllowOrigin::Any,
                 ]))