diff --git a/custom_colormaps/__init__.py b/custom_colormaps/__init__.py
index a02fcd5..d887440 100644
--- a/custom_colormaps/__init__.py
+++ b/custom_colormaps/__init__.py
@@ -1,5 +1,5 @@
 __author__ = "Rin Yamada"
-__version__ = "0.3.5"
+__version__ = "0.3.6"
 
 from . import return_colormap
 from . import main
diff --git a/pyproject.toml b/pyproject.toml
index 5e573f0..3bc323a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "custom-colormaps"
-version = "0.3.5"
+version = "0.3.6"
 description = "custom colormaps "
 authors = ["Rin Yamada <yamada@a.phys.nagoya-u.ac.jp>"]
 license = "MIT"
diff --git a/tests/test_metadata.py b/tests/test_metadata.py
index 278ef8c..dc77e03 100644
--- a/tests/test_metadata.py
+++ b/tests/test_metadata.py
@@ -6,4 +6,4 @@ def test_author():
 
 
 def test_version():
-    assert ccmap.__version__ == "0.3.5"
+    assert ccmap.__version__ == "0.3.6"