diff --git a/Changes.md b/Changes.md
index 9a7af60b15..980d047746 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,3 +1,11 @@
+4.x.x
+-----
+
+- OpenVDB : Updated to version 8.1.0.
+- TBB : Updated to version 2020.2.
+- Qt : Updated to version 5.15.2.
+- PySide : Updated to version 5.15.2.
+
 3.1.0
 -----
 
diff --git a/OpenVDB/config.py b/OpenVDB/config.py
index faa37a1e8d..ac04190045 100644
--- a/OpenVDB/config.py
+++ b/OpenVDB/config.py
@@ -2,7 +2,7 @@
 
 	"downloads" : [
 
-		"https://github.com/AcademySoftwareFoundation/openvdb/archive/v7.2.2.tar.gz"
+		"https://github.com/AcademySoftwareFoundation/openvdb/archive/refs/tags/v8.1.0.tar.gz"
 
 	],
 
diff --git a/PySide/config.py b/PySide/config.py
index 739949139e..9b0134f8b4 100644
--- a/PySide/config.py
+++ b/PySide/config.py
@@ -2,7 +2,7 @@
 
 	"downloads" : [
 
-		"https://download.qt.io/official_releases/QtForPython/pyside2/PySide2-5.12.6-src/pyside-setup-everywhere-src-5.12.6.tar.xz"
+		"https://download.qt.io/official_releases/QtForPython/pyside2/PySide2-5.15.2-src/pyside-setup-opensource-src-5.15.2.tar.xz"
 
 	],
 
@@ -21,7 +21,7 @@
 
 	"commands" : [
 
-		"python setup.py --verbose-build --ignore-git --no-examples --parallel {jobs} install",
+		"python setup.py --parallel {jobs} install",
 
 	],
 
diff --git a/PySide/patches/clang10Compatibility.patch b/PySide/patches/clang10Compatibility.patch
deleted file mode 100644
index 25b6a11299..0000000000
--- a/PySide/patches/clang10Compatibility.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp
-+++ b/sources/shiboken2/ApiExtractor/clangparser/compilersupport.cpp
-@@ -274,7 +274,7 @@ static QString findClangBuiltInIncludesDir()
-         for (const QFileInfo &fi : versionDirs) {
-             const QString fileName = fi.fileName();
-             if (fileName.at(0).isDigit()) {
--                const QVersionNumber versionNumber = QVersionNumber::fromString(fileName.at(0));
-+                const QVersionNumber versionNumber = QVersionNumber::fromString(fileName);
-                 if (!versionNumber.isNull() && versionNumber > lastVersionNumber) {
-                     candidate = fi.absoluteFilePath();
-                     lastVersionNumber = versionNumber;
diff --git a/Qt/config.py b/Qt/config.py
index 33089cde99..ba7ecc251e 100644
--- a/Qt/config.py
+++ b/Qt/config.py
@@ -2,7 +2,7 @@
 
 	"downloads" : [
 
-		"http://download.qt.io/official_releases/qt/5.12/5.12.10/single/qt-everywhere-src-5.12.10.tar.xz"
+		"http://download.qt.io/official_releases/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz"
 
 	],
 
@@ -21,7 +21,7 @@
 	"commands" : [
 
 		"./configure"
-			" -prefix {buildDir}"
+			" -prefix {buildDir} "
 			" -plugindir {buildDir}/qt/plugins"
 			" -release"
 			" -opensource -confirm-license"
@@ -74,7 +74,7 @@
 
 		"variables" : {
 
-			"extraArgs" : "-qt-xcb",
+			"extraArgs" : "-xcb -bundled-xcb-xinput",
 
 		},
 
diff --git a/TBB/config.py b/TBB/config.py
index df3e6eb138..3f3a3ed0cb 100644
--- a/TBB/config.py
+++ b/TBB/config.py
@@ -2,7 +2,7 @@
 
 	"downloads" : [
 
-		"https://github.com/01org/tbb/archive/2018_U5.tar.gz"
+		"https://github.com/oneapi-src/oneTBB/archive/refs/tags/v2020.2.tar.gz"
 
 	],
 
diff --git a/build.py b/build.py
index dcf52018e9..6b751180c3 100755
--- a/build.py
+++ b/build.py
@@ -14,7 +14,7 @@
 import tarfile
 import zipfile
 
-__version = "3.1.0"
+__version = "4.0.0"
 
 """
 Config file format