diff --git a/src/include/npkit/npkit.h b/src/include/npkit/npkit.h
index c535b2ccde..30c3a77ac6 100644
--- a/src/include/npkit/npkit.h
+++ b/src/include/npkit/npkit.h
@@ -20,9 +20,9 @@
 
 class NpKit {
  public:
-  static const uint64_t kNumGpuEventBuffers = 512;
+  static const uint64_t kNumGpuEventBuffers = 1024;
 
-  static const uint64_t kNumCpuEventBuffers = 32;
+  static const uint64_t kNumCpuEventBuffers = 64;
 
   static ncclResult_t Init(int rank);