diff --git a/tile/fiber/detail/fiber.cc b/tile/fiber/detail/fiber.cc
index 6757326..49be635 100644
--- a/tile/fiber/detail/fiber.cc
+++ b/tile/fiber/detail/fiber.cc
@@ -15,7 +15,7 @@ namespace detail {
 static thread_local Fiber *tls_current_fiber = nullptr;
 static thread_local Fiber *tls_master_fiber = nullptr;
 
-constexpr std::size_t kStackSize = 8192;
+constexpr std::size_t kStackSize = 128 * 1024; // 128k
 constexpr std::size_t kAlignSize = 16;
 
 void FiberEntry(fcontext_transfer_t t) {