diff --git a/sequence_tagging_for_ner/README_en.md b/sequence_tagging_for_ner/README_en.md
index dbe404339ffcfe3211b9d58f7147920c1c215533..b02a6508317952002202a313d32d73eebccbcd7b 100644
--- a/sequence_tagging_for_ner/README_en.md
+++ b/sequence_tagging_for_ner/README_en.md
@@ -166,7 +166,7 @@ The data_reader funtion in reader.py generate 3 return data: the word's index in
     ```
     
 The  second column is the predicted tag.
-Congratulations! job done!
+Congratulations! job done.
 
 
 ## Reference