diff --git a/.gitignore b/.gitignore
index eb2a1da..933737e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -186,4 +186,8 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
\ No newline at end of file
+#.idea/
+/dev/
+/test/
+/main.py
+/build_wheel.bat
diff --git a/pilk/__init__.py b/pilk/__init__.py
index b604027..ec95168 100644
--- a/pilk/__init__.py
+++ b/pilk/__init__.py
@@ -8,12 +8,12 @@
 __title__ = 'pilk'
 __description__ = 'python silk codec binding'
 __url__ = 'https://github.com/foyoux/pilk'
-__version__ = '0.0.2'
+__version__ = '0.2.4'
 # noinspection SpellCheckingInspection
 __author__ = 'foyou'
 __author_email__ = 'yimi.0822@qq.com'
-__license__ = 'Apache 2.0'
-__copyright__ = f'Copyright 2022 {__author__}'
+__license__ = ' GPL-3.0'
+__copyright__ = f'Copyright 2022~2023 {__author__}'
 __ide__ = 'PyCharm - https://www.jetbrains.com/pycharm/'
 
 
@@ -33,10 +33,8 @@ def get_duration(silk_path: str, frame_ms: int = 20) -> int:
             size = silk.read(2)
             if len(size) != 2:
                 break
-            size = size[0] + size[1] << 8
-            if not tencent and size == 0xffff:
-                break
             i += 1
+            size = size[0] + size[1] * 16
             silk.seek(silk.tell() + size)
         return i * frame_ms
 
diff --git a/setup.py b/setup.py
index 7879e03..adf354b 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
 # noinspection SpellCheckingInspection
 setup(
     name='pilk',
-    version='0.2.3',
+    version='0.2.4',
     description='python silk voice library',
     long_description=long_description,
     long_description_content_type='text/markdown',