diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index fc45c872e..7091b2aa2 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -4,4 +4,4 @@
 # in the repository, i.e. bar/baz will match /bar/baz and /foo/bar/baz.
 
 # The default owners for everything that is not overridden by specific patterns below.
-*   @microsoft/debugpy-CodeReviewers
+*   @microsoft/debugpy-CodeReviewers @microsoft/pyrx-admins
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e25104d5a..89197fa08 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -114,7 +114,7 @@ In order to update the source, you would:
 
 You might need to regenerate the Cython modules after any changes. This can be done by:
 
-- Install Python latest (3.12 as of this writing)
+- Install Python latest (3.14 as of this writing)
 - pip install cython 'django>=1.9' 'setuptools>=0.9' 'wheel>0.21' twine
 - On a windows machine:
   - set FORCE_PYDEVD_VC_VARS=C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvars64.bat
diff --git a/azure-pipelines/pipelines.yaml b/azure-pipelines/pipelines.yaml
index 196126510..f041cf236 100644
--- a/azure-pipelines/pipelines.yaml
+++ b/azure-pipelines/pipelines.yaml
@@ -135,6 +135,8 @@ stages:
             python.version: 3.12
           py313:
             python.version: 3.13
+          py314:
+            python.version: 3.14.0-rc.2
 
       steps:
 
@@ -178,6 +180,8 @@ stages:
             python.version: 3.12
           py313:
             python.version: 3.13
+          py314:
+            python.version: 3.14.0-rc.2
 
       steps:
 
@@ -224,6 +228,8 @@ stages:
             python.version: 3.12
           py313:
             python.version: 3.13
+          py314:
+            python.version: 3.14.0-rc.2
 
       steps:
 
diff --git a/azure-pipelines/templates/run_tests.yml b/azure-pipelines/templates/run_tests.yml
index 2efca2012..475b6ff91 100644
--- a/azure-pipelines/templates/run_tests.yml
+++ b/azure-pipelines/templates/run_tests.yml
@@ -3,11 +3,19 @@ steps:
     displayName: Setup Python packages
 
   - pwsh: |
-      $toxEnv = '$(python.version)'
-      if (-not $toxEnv.startsWith('pypy')) {
-        $toxEnv = 'py' + $toxEnv.Replace('.', '')
+      $raw = '$(python.version)'
+      if ($raw.StartsWith('pypy')) {
+        # For PyPy keep original pattern stripping dots after first two numeric components if needed later.
+        $toxEnv = 'py' + ($raw -replace '^pypy(\d+)\.(\d+).*$','$1$2')
       }
-      echo 'tox environment: $toxEnv'
+      else {
+        # Extract major.minor even from prerelease like 3.14.0-rc.2 -> 3.14
+        $mm = [regex]::Match($raw,'^(\d+)\.(\d+)')
+        if (-not $mm.Success) { throw "Unable to parse python.version '$raw'" }
+        $toxEnv = 'py' + $mm.Groups[1].Value + $mm.Groups[2].Value
+      }
+      Write-Host "python.version raw: $raw"
+      Write-Host "Derived tox environment: $toxEnv"
       python -m tox -e $toxEnv -- --junitxml=$(Build.ArtifactStagingDirectory)/tests.xml --debugpy-log-dir=$(Build.ArtifactStagingDirectory)/logs tests
     displayName: Run tests using tox
     env: 
diff --git a/azure-pipelines/templates/use_python.yml b/azure-pipelines/templates/use_python.yml
index 78afa7558..ecb69656c 100644
--- a/azure-pipelines/templates/use_python.yml
+++ b/azure-pipelines/templates/use_python.yml
@@ -3,4 +3,5 @@ steps:
     inputs:
       versionSpec: $(python.version)
       architecture: $(architecture)
+      allowUnstable: true
     displayName: Use Python $(python.version) $(architecture)
diff --git a/setup.py b/setup.py
index 2c4b9b8eb..e01f675ae 100644
--- a/setup.py
+++ b/setup.py
@@ -78,14 +78,12 @@ def finalize_options(self):
             "Compiling pydevd Cython extension modules (set SKIP_CYTHON_BUILD=1 to omit)."
         )
         try:
-            subprocess.check_call(
-                [
-                    sys.executable,
-                    os.path.join(PYDEVD_ROOT, "setup_pydevd_cython.py"),
-                    "build_ext",
-                    "--inplace",
-                ]
-            )
+            subprocess.check_call([
+                sys.executable,
+                os.path.join(PYDEVD_ROOT, "setup_pydevd_cython.py"),
+                "build_ext",
+                "--inplace",
+            ])
         except subprocess.SubprocessError:
             # pydevd Cython extensions are optional performance enhancements, and debugpy is
             # usable without them. Thus, we want to ignore build errors here by default, so
@@ -170,6 +168,8 @@ def tail_is(*suffixes):
             "Programming Language :: Python :: 3.10",
             "Programming Language :: Python :: 3.11",
             "Programming Language :: Python :: 3.12",
+            "Programming Language :: Python :: 3.13",
+            "Programming Language :: Python :: 3.14",
             "Topic :: Software Development :: Debuggers",
             "Operating System :: Microsoft :: Windows",
             "Operating System :: MacOS",
@@ -186,7 +186,7 @@ def tail_is(*suffixes):
             "debugpy._vendored",
         ],
         package_data={
-            "debugpy": ["ThirdPartyNotices.txt"],
+            "debugpy": ["ThirdPartyNotices.txt", "py.typed"],
             "debugpy._vendored": [
                 # pydevd extensions must be built before this list can be computed properly,
                 # so it is populated in the overridden build_py.finalize_options().
@@ -202,5 +202,5 @@ def tail_is(*suffixes):
                 "debugpy-adapter = debugpy.adapter.__main__:main",
             ],
         },
-        **extras
+        **extras,
     )
diff --git a/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py b/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py
index c0cf39542..0f35b8caf 100644
--- a/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py
+++ b/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_filtering.py
@@ -155,7 +155,8 @@ def _get_default_library_roots(cls):
 
         # Make sure we always get at least the standard library location (based on the `os` and
         # `threading` modules -- it's a bit weird that it may be different on the ci, but it happens).
-        roots.append(os.path.dirname(os.__file__))
+        if hasattr(os, "__file__"):
+            roots.append(os.path.dirname(os.__file__))
         roots.append(os.path.dirname(threading.__file__))
         if IS_PYPY:
             # On PyPy 3.6 (7.3.1) it wrongly says that sysconfig.get_path('stdlib') is
diff --git a/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/common/py_version.hpp b/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/common/py_version.hpp
index 712684cf3..15c05537c 100644
--- a/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/common/py_version.hpp
+++ b/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/common/py_version.hpp
@@ -24,6 +24,7 @@ enum PythonVersion {
     PythonVersion_311 = 0x030B,
     PythonVersion_312 = 0x030C,
     PythonVersion_313 = 0x030D,
+    PythonVersion_314 = 0x030E,
 };
 
 
@@ -78,6 +79,9 @@ static PythonVersion GetPythonVersion(void *module) {
                     if(version[3] == '3'){
                         return PythonVersion_313;
                     }
+                    if(version[3] == '4'){
+                        return PythonVersion_314;
+                    }
                 }
                 return PythonVersion_Unknown; // we don't care about 3.1 anymore...
             
diff --git a/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/linux_and_mac/compile_linux.sh b/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/linux_and_mac/compile_linux.sh
index 37204f50a..97cab104b 100755
--- a/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/linux_and_mac/compile_linux.sh
+++ b/src/debugpy/_vendored/pydevd/pydevd_attach_to_process/linux_and_mac/compile_linux.sh
@@ -8,4 +8,4 @@ case $ARCH in
 esac
 
 SRC="$(dirname "$0")/.."
-g++ -std=c++11 -shared -fPIC -O2 -D_FORTIFY_SOURCE=2 -nostartfiles --stack-protector-strong $SRC/linux_and_mac/attach.cpp -o $SRC/attach_linux_$SUFFIX.so
+g++ -std=c++11 -shared -fPIC -O2 -D_FORTIFY_SOURCE=2 -nostartfiles -fstack-protector-strong $SRC/linux_and_mac/attach.cpp -o $SRC/attach_linux_$SUFFIX.so
diff --git a/src/debugpy/_vendored/pydevd/pydevd_file_utils.py b/src/debugpy/_vendored/pydevd/pydevd_file_utils.py
index 390f903ce..7ca383444 100644
--- a/src/debugpy/_vendored/pydevd/pydevd_file_utils.py
+++ b/src/debugpy/_vendored/pydevd/pydevd_file_utils.py
@@ -88,7 +88,14 @@ def _get_library_dir():
                 break
 
     if library_dir is None or not os_path_exists(library_dir):
-        library_dir = os.path.dirname(os.__file__)
+        if hasattr(os, "__file__"):
+            # "os" is a frozen import an thus "os.__file__" is not always set.
+            # See https://github.com/python/cpython/pull/28656
+            library_dir = os.path.dirname(os.__file__)
+        else:
+            # "threading" is not a frozen import an thus "threading.__file__" is always set.
+            import threading
+            library_dir = os.path.dirname(threading.__file__)
 
     return library_dir
 
diff --git a/src/debugpy/_vendored/pydevd/pydevd_tracing.py b/src/debugpy/_vendored/pydevd/pydevd_tracing.py
index 41135d7dc..09b3dc44b 100644
--- a/src/debugpy/_vendored/pydevd/pydevd_tracing.py
+++ b/src/debugpy/_vendored/pydevd/pydevd_tracing.py
@@ -250,7 +250,9 @@ def get_python_helper_lib_filename():
         else:
             suffix = suffix_32
 
-        if IS_WINDOWS or IS_MAC:  # just the extension changes
+        if IS_WINDOWS:  # just the extension changes
+            prefix = "attach_"
+        elif IS_MAC:
             prefix = "attach"
             suffix = ""
         elif IS_LINUX:  #
diff --git a/src/debugpy/py.typed b/src/debugpy/py.typed
new file mode 100644
index 000000000..e69de29bb
diff --git a/tox.ini b/tox.ini
index 6a0d21eba..2a5ea04a2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{38,39,310,311,312,313}{,-cov}
+envlist = py{38,39,310,311,312,313,314}{,-cov}
 
 [testenv]
 deps = -rtests/requirements.txt
@@ -10,5 +10,5 @@ commands_pre = python build_attach_binaries.py
 commands =
     py{38,39}-!cov: python -m pytest {posargs}
     py{38,39}-cov: python -m pytest --cov --cov-append --cov-config=.coveragerc {posargs}
-    py{310,311,312,313}-!cov: python -Xfrozen_modules=off -m pytest {posargs}
-    py{310,311,312,313}-cov: python -Xfrozen_modules=off -m pytest --cov --cov-append --cov-config=.coveragerc {posargs}
+    py{310,311,312,313,314}-!cov: python -Xfrozen_modules=off -m pytest {posargs}
+    py{310,311,312,313,314}-cov: python -Xfrozen_modules=off -m pytest --cov --cov-append --cov-config=.coveragerc {posargs}