diff --git a/.gitmodules b/.gitmodules
index 7193d3b9..99476363 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,12 +1,15 @@
 [submodule "opencv"]
 	path = opencv
 	url = https://github.com/opencv/opencv.git
+	branch = 5.x
 [submodule "opencv_contrib"]
 	path = opencv_contrib
 	url = https://github.com/opencv/opencv_contrib.git
+	branch = 5.x
 [submodule "multibuild"]
 	path = multibuild
 	url = https://github.com/multi-build/multibuild.git
 [submodule "opencv_extra"]
 	path = opencv_extra
 	url = https://github.com/opencv/opencv_extra.git
+	branch = 5.x
diff --git a/opencv b/opencv
index 03cedee0..3b1ec72c 160000
--- a/opencv
+++ b/opencv
@@ -1 +1 @@
-Subproject commit 03cedee0b0258875eafd1576b59d686ba805da7a
+Subproject commit 3b1ec72cf5ab5949c8c9b2f421e897d7b3756570
diff --git a/opencv_contrib b/opencv_contrib
index 67337620..712f9758 160000
--- a/opencv_contrib
+++ b/opencv_contrib
@@ -1 +1 @@
-Subproject commit 673376203b0a8371a31ec5e8f08910a9744c0f32
+Subproject commit 712f9758c57edcefa99fc5ff6674352decc3cf31
diff --git a/opencv_extra b/opencv_extra
index 08fe33c7..0e3b933a 160000
--- a/opencv_extra
+++ b/opencv_extra
@@ -1 +1 @@
-Subproject commit 08fe33c733cabec70ffb6e5eac49708b073e5277
+Subproject commit 0e3b933aa762b28b54a40034c58f8c734f1ed759
diff --git a/pyproject.toml b/pyproject.toml
index 71de7f9b..270a25d1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-  "cmake>=3.1",
+  "cmake>=3.13",
   "numpy==1.13.3; python_version=='3.6' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
   "numpy==1.17.0; python_version=='3.7' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
   "numpy==1.17.5; python_version=='3.8' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
diff --git a/setup.py b/setup.py
index 48d5a65f..12eac0d5 100644
--- a/setup.py
+++ b/setup.py
@@ -103,14 +103,13 @@ def main():
         "cv2": ["*%s" % sysconfig.get_config_vars().get("SO"), "version.py"]
         + (["*.dll"] if os.name == "nt" else [])
         + ["LICENSE.txt", "LICENSE-3RD-PARTY.txt"],
-        "cv2.data": ["*.xml"],
     }
 
     # Files from CMake output to copy to package.
     # Path regexes with forward slashes relative to CMake install dir.
     rearrange_cmake_output_data = {
         "cv2": (
-            [r"bin/opencv_videoio_ffmpeg\d{4}%s\.dll" % ("_64" if is64 else "")]
+            [r"bin/opencv_videoio_ffmpeg\d{3}%s\.dll" % ("_64" if is64 else "")]
             if os.name == "nt"
             else []
         )
@@ -139,12 +138,6 @@ def main():
         +
         [ r"python/cv2/py.typed" ] if sys.version_info >= (3, 6) else []
         ,
-        "cv2.data": [  # OPENCV_OTHER_INSTALL_PATH
-            ("etc" if os.name == "nt" else "share/opencv4") + r"/haarcascades/.*\.xml"
-        ],
-        "cv2.gapi": [
-            "python/cv2" + r"/gapi/.*\.py"
-        ],
         "cv2.mat_wrapper": [
             "python/cv2" + r"/mat_wrapper/.*\.py"
         ],
@@ -164,11 +157,28 @@ def main():
     files_outside_package_dir = {"cv2": ["LICENSE.txt", "LICENSE-3RD-PARTY.txt"]}
 
     ci_cmake_generator = (
-        ["-G", "Visual Studio 14" + (" Win64" if is64 else "")]
+        ["-G", "Visual Studio 16"]
         if os.name == "nt"
         else ["-G", "Unix Makefiles"]
     )
 
+    generator_variant = []
+    if os.name == "nt":
+        if platform.machine() == "ARM64":
+            generator_variant = [ "-A", "ARM64",
+                # Emulated cmake requires following flags to correctly detect
+                # target architecture for windows/arm64 build
+                "-DOPENCV_WORKAROUND_CMAKE_20989=ON",
+                "-DCMAKE_SYSTEM_PROCESSOR=ARM64"]
+        elif is64:
+            generator_variant = ["-DCMAKE_GENERATOR_PLATFORM=x64"]
+        else:
+            generator_variant = ["-DCMAKE_GENERATOR_PLATFORM=Win32"]
+
+    print("Generator variant: ", generator_variant)
+
+    ci_cmake_generator = ci_cmake_generator + generator_variant
+
     cmake_args = (
         (ci_cmake_generator if is_CI_build else [])
         + [
@@ -197,18 +207,6 @@ def main():
             "-DPYTHON3_LIMITED_API=ON",
             "-DBUILD_OPENEXR=ON",
         ]
-        + (
-            # CMake flags for windows/arm64 build
-            ["-DCMAKE_GENERATOR_PLATFORM=ARM64",
-             # Emulated cmake requires following flags to correctly detect
-             # target architecture for windows/arm64 build
-             "-DOPENCV_WORKAROUND_CMAKE_20989=ON",
-             "-DCMAKE_SYSTEM_PROCESSOR=ARM64"]
-            if platform.machine() == "ARM64" and sys.platform == "win32"
-            # If it is not defined 'linker flags: /machine:X86' on Windows x64
-            else ["-DCMAKE_GENERATOR_PLATFORM=x64"] if is64 and sys.platform == "win32"
-            else []
-          )
         + (
             ["-DOPENCV_EXTRA_MODULES_PATH=" + os.path.abspath("opencv_contrib/modules")]
             if build_contrib
@@ -285,7 +283,7 @@ def main():
         install_requires=install_requires,
         python_requires=">=3.6",
         classifiers=[
-            "Development Status :: 5 - Production/Stable",
+            "Development Status :: 5 - Alpha",
             "Environment :: Console",
             "Intended Audience :: Developers",
             "Intended Audience :: Education",