diff --git a/README.rst b/README.rst
index 40cd2cd..7baf9cf 100644
--- a/README.rst
+++ b/README.rst
@@ -21,7 +21,7 @@ GitHub: https://github.com/animalize/pyzstd
 
 Release note
 ------------
-**0.15.5  (Apr 5, 2023)**
+**0.15.6  (Apr 5, 2023)**
 
 Update bundled zstd source code from v1.5.4 to `v1.5.5 <https://github.com/facebook/zstd/releases/tag/v1.5.5>`_.
 
diff --git a/src/__init__.py b/src/__init__.py
index 4437120..292df58 100644
--- a/src/__init__.py
+++ b/src/__init__.py
@@ -26,7 +26,7 @@ class PathLike:
             "library, make sure not to remove zstd library, and the run-time "
             "zstd library's version can't be lower than that at compile-time.")
 
-__version__ = '0.15.5'
+__version__ = '0.15.6'
 
 __doc__ = '''\
 Python bindings to Zstandard (zstd) compression library, the API style is