diff --git a/CHANGES.md b/CHANGES.md
index e5673b5f53191c8ba916d355a22bc52101ffffe2..8323d8bfcab8bdf6276e005e3cbff45ad5080dd5 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,8 @@
 
 ## Development ():
 
+## 0.9.9 (04.05.2020):
+
 * **Update**: Removed old source data identifier attribute
 
 ## 0.9.8 (24.03.2020):
diff --git a/docs/conf.py b/docs/conf.py
index 7706f36ea46d8053f41641cf82e71e26d0f42cb5..22d3d745b567ece2397c6baa51601550aa257218 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -22,7 +22,7 @@ copyright = '2019, Mark Hall'
 author = 'Mark Hall'
 
 # The full version, including alpha/beta/rc tags
-release = '0.5.1'
+release = '0.9.9'
 
 
 # -- General configuration ---------------------------------------------------