diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 0ce5e4e..2b8e40c 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.1.8
+current_version = 3.1.9
 tag = False
 commit = True
 
diff --git a/setup.py b/setup.py
index 71efacb..a2b4447 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name='rcpchgrowth',
-    version='3.1.8',
+    version='3.1.9',
     description='SDS and Centile calculations for UK Growth Data',
     long_description="https://github.com/rcpch/digital-growth-charts/blob/master/README.md",
     url='https://github.com/rcpch/digital-growth-charts/blob/master/README.md',