diff --git a/.bumpversion.cfg b/.bumpversion.cfg
new file mode 100644
index 0000000..68ad4e6
--- /dev/null
+++ b/.bumpversion.cfg
@@ -0,0 +1,33 @@
+[bumpversion]
+current_version = 0.0.1-dev
+commit = True
+tag = False
+parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?:-(?P<release>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+(?P<build>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?
+serialize = 
+	{major}.{minor}.{patch}-{release}+{build}
+	{major}.{minor}.{patch}+{build}
+	{major}.{minor}.{patch}-{release}
+	{major}.{minor}.{patch}
+
+[bumpversion:part:release]
+optional_value = production
+first_value = dev
+values = 
+	dev
+	production
+
+[bumpverion:part:build]
+values = [0-9A-Za-z-]+
+
+[bumpversion:file:setup.cfg]
+search = version = {current_version}
+replace = version = {new_version}
+
+[bumpversion:file:docs/source/conf.py]
+search = release = '{current_version}'
+replace = release = '{new_version}'
+
+[bumpversion:file:src/nrl/constants.py]
+search = VERSION = '{current_version}'
+replace = VERSION = '{new_version}'
+
diff --git a/src/nrl/constants.py b/src/nrl/constants.py
new file mode 100644
index 0000000..cdc0b1c
--- /dev/null
+++ b/src/nrl/constants.py
@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+
+"""Constants for NRL."""
+
+VERSION = '0.0.1-dev'