diff --git a/egs/librispeech/ASR/pruned_transducer_stateless7/train.py b/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
index 24829ae5b..21433dd59 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
@@ -928,7 +928,8 @@ def run(rank, world_size, args):
 
     optimizer = PrAdam(model.parameters(),
                        lr=params.initial_lr,
-                       max_block_size=512)
+                       max_block_size=512,
+                       lr_update_period=(200, 4000))
 
     scheduler = Eden(optimizer, params.lr_batches, params.lr_epochs)