diff --git a/Changes.md b/Changes.md
index 98b1053c24..bd1fb18ec4 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,3 +1,8 @@
+9.1.0 (relative to 9.0.0)
+-----
+
+- Cortex : Updated to version 10.5.11.0.
+
 9.0.0 (relative to 8.0.1)
 -----
 
diff --git a/Cortex/config.py b/Cortex/config.py
index ce103973d4..62bb3222c2 100644
--- a/Cortex/config.py
+++ b/Cortex/config.py
@@ -2,7 +2,7 @@
 
 	"downloads" : [
 
-		"https://github.com/ImageEngine/cortex/archive/refs/tags/10.5.10.0.tar.gz"
+		"https://github.com/ImageEngine/cortex/archive/refs/tags/10.5.11.0.tar.gz"
 
 	],
 
diff --git a/build.py b/build.py
index 3ddc79135f..264fabd751 100755
--- a/build.py
+++ b/build.py
@@ -14,7 +14,7 @@
 import tarfile
 import zipfile
 
-__version = "9.0.0"
+__version = "9.1.0"
 
 """
 Config file format