diff --git a/ultralytics/utils/metrics.py b/ultralytics/utils/metrics.py
index 7e393ae..6827453 100644
--- a/ultralytics/utils/metrics.py
+++ b/ultralytics/utils/metrics.py
@@ -625,7 +625,7 @@ class Metric(SimpleClass):
 
     def fitness(self):
         """Model fitness as a weighted combination of metrics."""
-        w = [0.0, 0.0, 0.1, 0.9]  # weights for [P, R, mAP@0.5, mAP@0.5:0.95]
+        w = [0.1, 0.4, 0.5, 0.0]  # weights for [P, R, mAP@0.5, mAP@0.5:0.95]
         return (np.array(self.mean_results()) * w).sum()
 
     def update(self, results):