diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3da59fe..b86c4ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 Changelog for ebi_eva_common_pyutils
 ===========================
 
+## 0.6.6 (unreleased)
+---------------------
+
+- Nothing changed yet.
+
+
 ## 0.6.5 (2024-04-02)
 ---------------------
 
diff --git a/setup.py b/setup.py
index 03dbe4d..467f746 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
     name='ebi_eva_common_pyutils',
     scripts=[os.path.join(os.path.dirname(__file__), 'ebi_eva_internal_pyutils', 'archive_directory.py')],
     packages=find_packages(),
-    version='0.6.5',
+    version='0.6.6.dev0',
     license='Apache',
     description='EBI EVA - Common Python Utilities',
     url='https://github.com/EBIVariation/eva-common-pyutils',