diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index db778089b..4f4fa82bb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -17,6 +17,7 @@ New Features
    - a6: purge based on commands passed to dbt ls (only missing: dbt deps)
          remove CachePurgeConfig
          add RenderConfig.airflow_vars_to_purge_cache
+   - a7: change from modified timestamp to sha256
 
 Others
 
diff --git a/cosmos/__init__.py b/cosmos/__init__.py
index d862dd2f8..de3763db7 100644
--- a/cosmos/__init__.py
+++ b/cosmos/__init__.py
@@ -5,7 +5,7 @@
 
 Contains dags, task groups, and operators.
 """
-__version__ = "1.5.0a6"
+__version__ = "1.5.0a7"
 
 
 from cosmos.airflow.dag import DbtDag