diff --git a/src/search.cpp b/src/search.cpp
index bdcecd1c..06c6e198 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -787,7 +787,7 @@ Value Search::Worker::search(
         assert(eval - beta >= 0);
 
         // Null move dynamic reduction based on depth and eval
-        Depth R = std::min(int(eval - beta) / 144, 6) + depth / 3 + 4;
+        Depth R = std::min(int(eval - beta) / 144, 6) + depth / 3 + 5;
 
         ss->currentMove         = Move::null();
         ss->continuationHistory = &thisThread->continuationHistory[0][0][NO_PIECE][0];