diff --git a/MANIFEST.in b/MANIFEST.in
index a75f803..1c78f2e 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,3 @@
+include ckwrap/_ckwrap.pyx
 include Ckmeans.1d.dp/src/*.cpp
 include Ckmeans.1d.dp/src/*.h
diff --git a/setup.py b/setup.py
index b86363b..7b49600 100644
--- a/setup.py
+++ b/setup.py
@@ -30,8 +30,8 @@
 
 setup(
     name="ckwrap",
-    version="0.1.9",
-    description="Python wrapper for Ckmeans.1d.dp, 4.3.3.",
+    version="0.1.10",
+    description="Python wrapper for Ckmeans.1d.dp, 4.3.4.",
     long_description=long_description,
     long_description_content_type="text/markdown",
     author="djdt",