diff --git a/examples/aishell/README.md b/examples/aishell/README.md
index 3e4c2e5f4..c59703030 100644
--- a/examples/aishell/README.md
+++ b/examples/aishell/README.md
@@ -3,5 +3,5 @@
 ## CTC
 | Model | Config | Test Set |  CER | Valid Loss |
 | --- | --- | --- | --- | --- |
-| DeepSpeech2 | conf/deepspeech2.yaml | test | 0.077870 | 7.036566 |
+| DeepSpeech2 | conf/deepspeech2.yaml | test | 0.077478 | 7.036566 |
 | DeepSpeech2 | release 1.8.5 | test | 0.080447 | - |
diff --git a/examples/aishell/conf/deepspeech2.yaml b/examples/aishell/conf/deepspeech2.yaml
index d42cb9566..dcea2a655 100644
--- a/examples/aishell/conf/deepspeech2.yaml
+++ b/examples/aishell/conf/deepspeech2.yaml
@@ -39,7 +39,7 @@ decoding:
   error_rate_type: cer 
   decoding_method: ctc_beam_search
   lang_model_path: data/lm/zh_giga.no_cna_cmn.prune01244.klm
-  alpha: 2.4
+  alpha: 2.2
   beta: 5.0
   beam_size: 300
   cutoff_prob: 0.99