diff --git a/src/thread_pool.cpp b/src/thread_pool.cpp
index 31b7b3cc2803e72b814aa9b6f90885abbe341daa..2daa3b93bc1f948e38d53fb4d36b3832fca1f061 100644
--- a/src/thread_pool.cpp
+++ b/src/thread_pool.cpp
@@ -26,7 +26,7 @@
 
 namespace dht {
 
-constexpr const size_t IO_THREADS_MAX {64};
+constexpr const size_t IO_THREADS_MAX {512};
 
 ThreadPool&
 ThreadPool::computation()