diff --git a/HISTORY.rst b/HISTORY.rst
index 87b7331..716bfa7 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -15,7 +15,7 @@ History
 * Initial documentation added
 * `phase` and `type` properties renamed to `name`
 
-0.3.0 (2016-02-22)
+0.3.1 (2016-02-22)
 ------------------
 * classification is persitant trough fancy indexing
 * empty classes allowed
diff --git a/polylx/__init__.py b/polylx/__init__.py
index a5184ec..08faed4 100644
--- a/polylx/__init__.py
+++ b/polylx/__init__.py
@@ -9,4 +9,4 @@
 
 __author__ = 'Ondrej Lexa'
 __email__ = 'lexa.ondrej@gmail.com'
-__version__ = '0.3.0'
+__version__ = '0.3.1'
diff --git a/setup.py b/setup.py
index 1450aa8..75e95da 100755
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@
 
 setup(
     name='polylx',
-    version='0.3.0',
+    version='0.3.1',
     description="A Python package to visualize and analyze microstructures.",
     long_description=readme + '\n\n' + history,
     author="Ondrej Lexa",