diff --git a/package.xml b/package.xml
index eb2e2d55..c519237a 100644
--- a/package.xml
+++ b/package.xml
@@ -3,7 +3,7 @@
 <package format="3">
   <name>py_trees</name>
   <!-- When updating, also update setup.py and version.py -->
-  <version>2.1.0</version>
+  <version>2.1.1</version>
   <description>
     Pythonic implementation of behaviour trees.
   </description>
diff --git a/py_trees/version.py b/py_trees/version.py
index eafd9348..df399d80 100644
--- a/py_trees/version.py
+++ b/py_trees/version.py
@@ -16,4 +16,4 @@
 ##############################################################################
 
 # When changing, Also update setup.py and package.xml
-__version__ = '2.1.0'
+__version__ = '2.1.1'
diff --git a/setup.py b/setup.py
index 2aa7a325..22cf74ce 100755
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@
 # That is the price paid for a pypi and catkin package.
 d = setup(
     name='py_trees',
-    version='2.1.0',  # also update package.xml and version.py
+    version='2.1.1',  # also update package.xml and version.py
     packages=find_packages(exclude=['tests*', 'docs*']),
     install_requires=install_requires,
     extras_require=extras_require,