diff --git a/examples/aishell/README.md b/examples/aishell/README.md
index c597030300f308868daecc570cdd163e0fcf0904..fdb4c133bd1aadc220dbb374640d5e1a5c14b1ad 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 | 0.077478 | 7.036566 |
+| DeepSpeech2 | conf/deepspeech2.yaml | test | 0.077249 | 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 dcea2a65577075b7c232b2adb11e8ac2a776a167..a50a7ecf554dab613bd1da7f1a86fbabc3339b50 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: 2.2
+  alpha: 1.9
   beta: 5.0
   beam_size: 300
   cutoff_prob: 0.99