diff --git a/pom.xml b/pom.xml
index 19a85db0..8b7b91dc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>uk.co.gresearch.spark</groupId>
   <artifactId>spark-extension_2.13</artifactId>
-  <version>2.12.0-3.5</version>
+  <version>2.13.0-3.5-SNAPSHOT</version>
   <name>Spark Extension</name>
   <description>A library that provides useful extensions to Apache Spark.</description>
   <inceptionYear>2020</inceptionYear>
diff --git a/python/setup.py b/python/setup.py
index a5843f43..0032084a 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -17,7 +17,7 @@
 from pathlib import Path
 from setuptools import setup
 
-jar_version = '2.12.0-3.5'
+jar_version = '2.13.0-3.5-SNAPSHOT'
 scala_version = '2.13.8'
 scala_compat_version = '.'.join(scala_version.split('.')[:2])
 spark_compat_version = jar_version.split('-')[1]