diff --git a/deps/libtuv b/deps/libtuv
index 9cd1daa..4f51adb 160000
--- a/deps/libtuv
+++ b/deps/libtuv
@@ -1 +1 @@
-Subproject commit 9cd1daaab0b1e491683a271aff582937bb376977
+Subproject commit 4f51adbd57db2aa8a497462cf92f1d08fa8b52fc
diff --git a/src/pow_avx.c b/src/pow_avx.c
index 25a67f8..1feb72b 100644
--- a/src/pow_avx.c
+++ b/src/pow_avx.c
@@ -607,6 +607,7 @@ static bool PoWAVX_Context_Initialize(ImplContext *impl_ctx)
         impl_ctx->bitmap = impl_ctx->bitmap << 1 | 0x1;
         uv_loop_init(&ctx[i].loop);
     }
+    uv_set_threadpool_size(nproc);
     impl_ctx->context = ctx;
     uv_mutex_init(&impl_ctx->lock);
     return true;
diff --git a/src/pow_c.c b/src/pow_c.c
index 5c44e26..640b659 100644
--- a/src/pow_c.c
+++ b/src/pow_c.c
@@ -371,6 +371,7 @@ static bool PoWC_Context_Initialize(ImplContext *impl_ctx)
         impl_ctx->bitmap = impl_ctx->bitmap << 1 | 0x1;
         uv_loop_init(&ctx[i].loop);
     }
+    uv_set_threadpool_size(nproc);
     impl_ctx->context = ctx;
     uv_mutex_init(&impl_ctx->lock);
     return true;
diff --git a/src/pow_sse.c b/src/pow_sse.c
index b2e77e7..cec30d1 100644
--- a/src/pow_sse.c
+++ b/src/pow_sse.c
@@ -389,6 +389,7 @@ static bool PoWSSE_Context_Initialize(ImplContext *impl_ctx)
         impl_ctx->bitmap = impl_ctx->bitmap << 1 | 0x1;
         uv_loop_init(&ctx[i].loop);
     }
+    uv_set_threadpool_size(nproc);
     impl_ctx->context = ctx;
     uv_mutex_init(&impl_ctx->lock);
     return true;