diff --git a/io_scene_gltf2/__init__.py b/io_scene_gltf2/__init__.py
index 35380dd9d994485be20dcaa978df5940c5026e41..e1a808621c9dde588b65410bcdafc9c190084f96 100755
--- a/io_scene_gltf2/__init__.py
+++ b/io_scene_gltf2/__init__.py
@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (1, 4, 18),
+    "version": (1, 4, 19),
     'blender': (2, 90, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
diff --git a/io_scene_gltf2/io/imp/gltf2_io_binary.py b/io_scene_gltf2/io/imp/gltf2_io_binary.py
index 5346d9f5cfc78acc6737cad6336ad7b0a4484525..fddc8030f6439d6fb9a4050f34b9e8f266798abb 100755
--- a/io_scene_gltf2/io/imp/gltf2_io_binary.py
+++ b/io_scene_gltf2/io/imp/gltf2_io_binary.py
@@ -16,6 +16,7 @@ import struct
 import numpy as np
 
 from ..com.gltf2_io import Accessor
+from ..com.gltf2_io_constants import ComponentType, DataType
 
 
 class BinaryData():
@@ -93,14 +94,8 @@ class BinaryData():
         # doesn't matter because nothing uses them.
         assert accessor.type not in ['MAT2', 'MAT3']
 
-        dtype = {
-            5120: np.int8,
-            5121: np.uint8,
-            5122: np.int16,
-            5123: np.uint16,
-            5125: np.uint32,
-            5126: np.float32,
-        }[accessor.component_type]
+        dtype = ComponentType.to_numpy_dtype(accessor.component_type)
+        component_nb = DataType.num_elements(accessor.type)
 
         if accessor.buffer_view is not None:
             bufferView = gltf.data.buffer_views[accessor.buffer_view]
@@ -109,9 +104,7 @@ class BinaryData():
             accessor_offset = accessor.byte_offset or 0
             buffer_data = buffer_data[accessor_offset:]
 
-            component_nb = gltf.component_nb_dict[accessor.type]
             bytes_per_elem = dtype(1).nbytes
-
             default_stride = bytes_per_elem * component_nb
             stride = bufferView.byte_stride or default_stride
 
@@ -146,7 +139,6 @@ class BinaryData():
 
         else:
             # No buffer view; initialize to zeros
-            component_nb = gltf.component_nb_dict[accessor.type]
             array = np.zeros((accessor.count, component_nb), dtype=dtype)
 
         if accessor.sparse:
diff --git a/io_scene_gltf2/io/imp/gltf2_io_gltf.py b/io_scene_gltf2/io/imp/gltf2_io_gltf.py
index 49eee2d540752d1d6a5bae5ec6a46777345a4dcb..1607979a258880df973ed119c1b3e4684d578000 100755
--- a/io_scene_gltf2/io/imp/gltf2_io_gltf.py
+++ b/io_scene_gltf2/io/imp/gltf2_io_gltf.py
@@ -51,24 +51,6 @@ class glTFImporter():
             'KHR_mesh_quantization',
         ]
 
-        # TODO : merge with io_constants
-        self.fmt_char_dict = {}
-        self.fmt_char_dict[5120] = 'b'  # Byte
-        self.fmt_char_dict[5121] = 'B'  # Unsigned Byte
-        self.fmt_char_dict[5122] = 'h'  # Short
-        self.fmt_char_dict[5123] = 'H'  # Unsigned Short
-        self.fmt_char_dict[5125] = 'I'  # Unsigned Int
-        self.fmt_char_dict[5126] = 'f'  # Float
-
-        self.component_nb_dict = {}
-        self.component_nb_dict['SCALAR'] = 1
-        self.component_nb_dict['VEC2'] = 2
-        self.component_nb_dict['VEC3'] = 3
-        self.component_nb_dict['VEC4'] = 4
-        self.component_nb_dict['MAT2'] = 4
-        self.component_nb_dict['MAT3'] = 9
-        self.component_nb_dict['MAT4'] = 16
-
     @staticmethod
     def bad_json_value(val):
         """Bad Json value."""