diff --git a/examples/ja_example.py b/examples/ja_example.py
index b5710c7..1815c2c 100644
--- a/examples/ja_example.py
+++ b/examples/ja_example.py
@@ -17,9 +17,9 @@
 dict_type = 'neologd'
 path_mecab_config = '/usr/local/bin/'
 pos_condition = [('名詞', )]
-mysql_username = ''
+mysql_username = 'your-mysql-user-name-here'
 mysql_hostname = 'localhost'
-mysql_password = ''
+mysql_password = 'your-mysql-password-here'
 mysql_db_name = 'wikipedia'
 # ------------------------------------------------------------
 entity_linking_model = load_entity_model(path_model_file)
diff --git a/setup.py b/setup.py
index 42ef857..34dc024 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 from setuptools import setup, find_packages
 
 name='word2vec_wikification_py'
-version='0.15'
+version='0.16'
 description='A package to run wikification'
 author='Kensuke Mitsuzawa'
 author_email='kensuke.mit@gmail.com'
@@ -12,7 +12,6 @@
 
 install_requires = [
     'gensim',
-    'mysqlclient',
     'pymysql',
     'typing'
 ]
diff --git a/word2vec_wikification_py/init_logger.py b/word2vec_wikification_py/init_logger.py
index 7fc7684..0da0458 100644
--- a/word2vec_wikification_py/init_logger.py
+++ b/word2vec_wikification_py/init_logger.py
@@ -15,7 +15,7 @@
 # StreamHandler
 STREAM_LEVEL = logging.DEBUG
 STREAM_FORMATTER = custmoFormatter
-STREAM = sys.stdout
+STREAM = sys.stderr
 
 st_handler = StreamHandler(stream=STREAM)
 st_handler.setLevel(STREAM_LEVEL)
diff --git a/word2vec_wikification_py/make_lattice.py b/word2vec_wikification_py/make_lattice.py
index 88c7704..ac3e64c 100644
--- a/word2vec_wikification_py/make_lattice.py
+++ b/word2vec_wikification_py/make_lattice.py
@@ -2,7 +2,7 @@
 from gensim.models import Word2Vec
 from word2vec_wikification_py import init_logger
 from word2vec_wikification_py.models import WikipediaArticleObject, PersistentDict, LatticeObject, IndexDictionaryObject, EdgeObject
-from typing import List, Tuple, Union, Any, Dict
+from typing import List, Tuple, Union, Any, Dict, Set
 from tempfile import mkdtemp
 from scipy.sparse import csr_matrix
 import os
@@ -48,9 +48,9 @@ def make_state_transition_edge(state_t_word_tuple:Tuple[int,str],
     - tuple object whose element is (transition_element, row2index, column2index)
     - transition_element is (row_index, column_index, transition_score)
     """
-    if not state_t_word_tuple[1] in entity_vector.vocab:
+    if not state_t_word_tuple[1] in entity_vector.wv.vocab:
         raise Exception('Element does not exist in entity_voctor model. element={}'.format(state_t_word_tuple))
-    if not state_t_plus_word_tuple[1] in entity_vector.vocab:
+    if not state_t_plus_word_tuple[1] in entity_vector.wv.vocab:
         raise Exception('Element does not exist in entity_voctor model. element={}'.format(state_t_plus_word_tuple))
 
     transition_score = entity_vector.similarity(state_t_word_tuple[1], state_t_plus_word_tuple[1])  # type: float
@@ -134,7 +134,7 @@ def make_state_transition_sequence(seq_wiki_article_name:List[WikipediaArticleOb
     return (state2index_obj, seq_edge_group, transition_matrix)
 
 
-def filter_out_of_vocabulary_word(wikipedia_article_obj: WikipediaArticleObject, vocabulary_words:set)->Union[bool, WikipediaArticleObject]:
+def filter_out_of_vocabulary_word(wikipedia_article_obj: WikipediaArticleObject, vocabulary_words:Set)->Union[bool, WikipediaArticleObject]:
     """* What you can do
     - You remove out-of-vocabulary word from wikipedia_article_obj.candidate_article_name
     """
@@ -173,7 +173,7 @@ def make_lattice_object(seq_wiki_article_name:List[WikipediaArticleObject],
         state2index=persistent_state2index,
         index2state={})
 
-    vocabulary_words = set(entity_vector_model.vocab.keys())
+    vocabulary_words = set(entity_vector_model.wv.vocab.keys())
     seq_wiki_article_name = [
         wiki_article_name
         for wiki_article_name in seq_wiki_article_name