diff --git a/underthesea/VERSION b/underthesea/VERSION
index e9bc1499..645377ee 100644
--- a/underthesea/VERSION
+++ b/underthesea/VERSION
@@ -1 +1 @@
-1.1.14
+1.1.15
diff --git a/underthesea/chunking/model.bin b/underthesea/chunking/chunk_crf_2017_10_12.bin
similarity index 100%
rename from underthesea/chunking/model.bin
rename to underthesea/chunking/chunk_crf_2017_10_12.bin
diff --git a/underthesea/chunking/model_crf.py b/underthesea/chunking/model_crf.py
index b98ad657..3de8e364 100644
--- a/underthesea/chunking/model_crf.py
+++ b/underthesea/chunking/model_crf.py
@@ -13,7 +13,7 @@
 class CRFChunkingPredictor:
     def __init__(self):
         self.model = pycrfsuite.Tagger()
-        filepath = join(dirname(__file__), "model.bin")
+        filepath = join(dirname(__file__), "chunk_crf_2017_10_12.bin")
         self.model.open(filepath)
 
         template = [
diff --git a/underthesea/ner/model_crf.py b/underthesea/ner/model_crf.py
index 9d1f239f..cf08a37c 100644
--- a/underthesea/ner/model_crf.py
+++ b/underthesea/ner/model_crf.py
@@ -13,7 +13,7 @@
 class CRFNERPredictor:
     def __init__(self):
         self.model = pycrfsuite.Tagger()
-        filepath = join(dirname(__file__), "model.bin")
+        filepath = join(dirname(__file__), "ner_crf_2017_10_12.bin")
         self.model.open(filepath)
 
         template = [
diff --git a/underthesea/ner/model.bin b/underthesea/ner/ner_crf_2017_10_12.bin
similarity index 100%
rename from underthesea/ner/model.bin
rename to underthesea/ner/ner_crf_2017_10_12.bin
diff --git a/underthesea/pos_tag/model_crf.py b/underthesea/pos_tag/model_crf.py
index b84f1f6f..fc7d9c26 100644
--- a/underthesea/pos_tag/model_crf.py
+++ b/underthesea/pos_tag/model_crf.py
@@ -8,7 +8,7 @@
 class CRFPOSTagPredictor:
     def __init__(self):
         self.model = pycrfsuite.Tagger()
-        filepath = join(dirname(__file__), "model.bin")
+        filepath = join(dirname(__file__), "pos_crf_2017_10_11.bin")
         self.model.open(filepath)
 
         template = [
diff --git a/underthesea/pos_tag/model.bin b/underthesea/pos_tag/pos_crf_2017_10_11.bin
similarity index 100%
rename from underthesea/pos_tag/model.bin
rename to underthesea/pos_tag/pos_crf_2017_10_11.bin
diff --git a/underthesea/sent_tokenize/__init__.py b/underthesea/sent_tokenize/__init__.py
index 2f500ef4..dceeb70c 100644
--- a/underthesea/sent_tokenize/__init__.py
+++ b/underthesea/sent_tokenize/__init__.py
@@ -7,7 +7,7 @@
 
 
 def sent_tokenize(text):
-    model_path = join(dirname(__file__), 'sent_tokenize_model_v1.0.pkl')
+    model_path = join(dirname(__file__), 'st_kiss-strunk-2006_2019_01_13.pkl')
     with open(model_path, 'rb') as fs:
         punkt_param = pickle.load(fs)
 
diff --git a/underthesea/sent_tokenize/sent_tokenize_model_v1.0.pkl b/underthesea/sent_tokenize/st_kiss-strunk-2006_2019_01_13.pkl
similarity index 100%
rename from underthesea/sent_tokenize/sent_tokenize_model_v1.0.pkl
rename to underthesea/sent_tokenize/st_kiss-strunk-2006_2019_01_13.pkl
diff --git a/underthesea/word_tokenize/model.py b/underthesea/word_tokenize/model.py
index ecad9781..62be5f29 100644
--- a/underthesea/word_tokenize/model.py
+++ b/underthesea/word_tokenize/model.py
@@ -28,7 +28,7 @@ class CRFModel:
 
     def __init__(self, model_path=None):
         if not model_path:
-            model_path = join(dirname(__file__), "model_vlsp2013.bin")
+            model_path = join(dirname(__file__), "wt_crf_2018_09_13.bin")
         estimator = pycrfsuite.Tagger()
         estimator.open(model_path)
         self.estimator = estimator
diff --git a/underthesea/word_tokenize/model_vlsp2013.bin b/underthesea/word_tokenize/wt_crf_2018_09_13.bin
similarity index 100%
rename from underthesea/word_tokenize/model_vlsp2013.bin
rename to underthesea/word_tokenize/wt_crf_2018_09_13.bin