diff --git a/src/search.cpp b/src/search.cpp
index d7a8379a..421d95fe 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -327,7 +327,7 @@ namespace {
             // Reset aspiration window starting size
             if (depth >= 5)
             {
-                delta = Value(16);
+                delta = Value(depth > 23 ? 16 : 12);
                 alpha = std::max(RootMoves[PVIdx].prevScore - delta,-VALUE_INFINITE);
                 beta  = std::min(RootMoves[PVIdx].prevScore + delta, VALUE_INFINITE);
             }