diff --git a/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py b/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
index a122a112f..958ddf2b0 100644
--- a/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless7/zipformer.py
@@ -1405,7 +1405,7 @@ class AttentionSqueeze(nn.Module):
 
         self.out_balancer = ActivationBalancer(
             channels, channel_dim=-1,
-            min_positive=0.4, max_positive=0.5,
+            min_positive=0.3, max_positive=0.7,
             min_abs=ScheduledFloat((0.0, 0.002), (8000.0, 0.02), (20000.0, 0.01)),
         )
 
@@ -1539,7 +1539,7 @@ class NonlinAttentionModule(nn.Module):
 
         self.balancer2 = ActivationBalancer(
             channels, channel_dim=-1,
-            min_positive=0.4, max_positive=0.5,
+            min_positive=0.3, max_positive=0.7,
             min_abs=ScheduledFloat((0.0, 0.001), (8000.0, 0.01), (20000.0, 0.005)),
         )