diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 099d08236..db778089b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-1.5.0a4 (2024-06-03)
+1.5.0a6 (2024-06-11)
 --------------------
 
 New Features
@@ -14,6 +14,9 @@ New Features
    - since a3: different approach than 1.5.0a1 and 1.5.0a2
    - a4: fix DbtTaskGroup logging
    - a5: introduce CachePurgeConfig
+   - a6: purge based on commands passed to dbt ls (only missing: dbt deps)
+         remove CachePurgeConfig
+         add RenderConfig.airflow_vars_to_purge_cache
 
 Others
 
diff --git a/cosmos/__init__.py b/cosmos/__init__.py
index 79810f6d3..d862dd2f8 100644
--- a/cosmos/__init__.py
+++ b/cosmos/__init__.py
@@ -5,7 +5,7 @@
 
 Contains dags, task groups, and operators.
 """
-__version__ = "1.5.0a5"
+__version__ = "1.5.0a6"
 
 
 from cosmos.airflow.dag import DbtDag