diff --git a/derivative/__version__.py b/derivative/__version__.py
index 4e5efb5..f3587bf 100644
--- a/derivative/__version__.py
+++ b/derivative/__version__.py
@@ -1 +1 @@
-__version__: str = '0.6.2'
+__version__: str = '0.6.3'
diff --git a/pyproject.toml b/pyproject.toml
index e7be74d..3339e70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "derivative"
-version = "0.6.2"
+version = "0.6.3"
 description = "Numerical differentiation in python."
 repository = "https://github.com/andgoldschmidt/derivative"
 documentation = "https://derivative.readthedocs.io/"