diff --git a/Changes b/Changes
index 70cc0cb379..fbb5e6a114 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,8 @@
+1.5.0
+-----
+
+- Cortex : Updated to 10.0.0-a79.
+
 1.4.1
 -----
 
diff --git a/Cortex/config.py b/Cortex/config.py
index 972eef85f9..f56ea61ac7 100644
--- a/Cortex/config.py
+++ b/Cortex/config.py
@@ -2,7 +2,7 @@
 
 	"downloads" : [
 
-		"https://github.com/ImageEngine/cortex/archive/10.0.0-a76.tar.gz"
+		"https://github.com/ImageEngine/cortex/archive/10.0.0-a79.tar.gz"
 
 	],
 
@@ -12,7 +12,7 @@
 
 	"dependencies" : [
 		"Python", "OpenImageIO", "IlmBase", "PyIlmBase", "Boost", "OpenShadingLanguage",
-		"Blosc", "FreeType", "GLEW", "Appleseed", "TBB", "OpenVDB", "USD"
+		"Blosc", "FreeType", "GLEW", "Appleseed", "TBB", "OpenVDB", "USD", "Six"
 	],
 
 	"environment" : {
diff --git a/Cortex/patches/0001-IECoreGL-Shader-Support-3D-samplers.patch b/Cortex/patches/0001-IECoreGL-Shader-Support-3D-samplers.patch
deleted file mode 100644
index 6ba3bbfad1..0000000000
--- a/Cortex/patches/0001-IECoreGL-Shader-Support-3D-samplers.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/src/IECoreGL/Shader.cpp b/src/IECoreGL/Shader.cpp
-index 207c12077..bc2d3f7ca 100644
---- a/src/IECoreGL/Shader.cpp
-+++ b/src/IECoreGL/Shader.cpp
-@@ -181,7 +181,7 @@ class Shader::Implementation : public IECore::RefCounted
- 						}
- 					}
- 
--					if( p.type == GL_SAMPLER_2D )
-+					if( p.type == GL_SAMPLER_2D || p.type == GL_SAMPLER_3D )
- 					{
- 						// we assign a specific texture unit to each individual
- 						// sampler parameter - this makes it much easier to save
-
diff --git a/build.py b/build.py
index e682d390c0..2e5f12ec01 100755
--- a/build.py
+++ b/build.py
@@ -15,7 +15,7 @@
 import tarfile
 import zipfile
 
-__version = "1.4.1"
+__version = "1.5.0"
 
 def __projects() :