diff --git a/pyconcrete-admin.py b/pyconcrete-admin.py
index a1abcd9..9a0f1df 100755
--- a/pyconcrete-admin.py
+++ b/pyconcrete-admin.py
@@ -190,9 +190,10 @@ def release(self, args):
             import pypandoc
             readme = pypandoc.convert('README.md', 'rst')
             with open('README.rst', 'wb') as f:
-                f.write(readme)
+                f.write(readme.encode('utf8'))
         except ImportError:
             print('you need to install `pypandoc` before release pyconcrete')
+            raise
 
         subprocess.call('python setup.py sdist', shell=True)  # ignore can't found README error
         subprocess.check_output('twine upload dist/*', shell=True)
diff --git a/src/pyconcrete/version.py b/src/pyconcrete/version.py
index 2c7bffb..f8d9095 100644
--- a/src/pyconcrete/version.py
+++ b/src/pyconcrete/version.py
@@ -1 +1 @@
-__version__ = '0.12.0'
+__version__ = '0.12.1'