diff --git a/Dockerfile.test b/Dockerfile.test
new file mode 100644
index 00000000..f8c17e90
--- /dev/null
+++ b/Dockerfile.test
@@ -0,0 +1,4 @@
+FROM preprod-sklearn:1.4-2-py312
+ADD . /app
+WORKDIR /app
+RUN python3 -m pip install .[test]
\ No newline at end of file
diff --git a/docker/1.4-2-py312/base/Dockerfile.cpu b/docker/1.4-2-py312/base/Dockerfile.cpu
new file mode 100644
index 00000000..7d97f5d2
--- /dev/null
+++ b/docker/1.4-2-py312/base/Dockerfile.cpu
@@ -0,0 +1,91 @@
+ARG UBUNTU_VERSION=24.04
+ARG UBUNTU_IMAGE_DIGEST=b359f1067efa76f37863778f7b6d0e8d911e3ee8efa807ad01fbf5dc1ef9006b
+
+# Build stage for SQLite compilation
+FROM ubuntu:${UBUNTU_VERSION}@sha256:${UBUNTU_IMAGE_DIGEST} as sqlite-builder
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        build-essential wget ca-certificates && \
+    cd /tmp && \
+    wget https://www.sqlite.org/2025/sqlite-autoconf-3500200.tar.gz && \
+    tar xzf sqlite-autoconf-3500200.tar.gz && \
+    cd sqlite-autoconf-3500200 && \
+    ./configure --prefix=/usr/local && \
+    make && \
+    make install && \
+    ldconfig && \
+    cd / && \
+    rm -rf /tmp/sqlite-autoconf-3500200 /tmp/sqlite-autoconf-3500200.tar.gz && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Main image
+FROM ubuntu:${UBUNTU_VERSION}@sha256:${UBUNTU_IMAGE_DIGEST}
+
+ARG PYTHON_VERSION=3.12
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install runtime dependencies only
+RUN apt-get update && \
+    apt-get -y upgrade && \
+    apt-get -y install --no-install-recommends \
+        curl git jq libatlas-base-dev nginx openjdk-8-jdk-headless unzip wget expat tzdata apparmor \
+        libgstreamer1.0-0 libxml2 libsqlite3-0 software-properties-common ca-certificates lsb-release \
+        build-essential linux-libc-dev && \
+    # Add Apache Arrow repository for runtime libraries only
+    wget https://packages.apache.org/artifactory/arrow/$(lsb_release --id --short | tr 'A-Z' 'a-z')/apache-arrow-apt-source-latest-$(lsb_release --codename --short).deb && \
+    apt install -y -V ./apache-arrow-apt-source-latest-$(lsb_release --codename --short).deb && \
+    apt-get update && \
+    apt-get install -y -V libarrow-dev=17.0.0-1 libarrow-dataset-dev=17.0.0-1 libparquet-dev=17.0.0-1 libarrow-acero-dev=17.0.0-1 && \
+    # Add deadsnakes PPA for Python 3.12
+    add-apt-repository ppa:deadsnakes/ppa && \
+    apt-get update && \
+    apt-get -y install --no-install-recommends \
+        python3.12 python3.12-dev && \
+    update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 1 && \
+    # Create python symlink for backward compatibility
+    ln -sf /usr/bin/python3 /usr/bin/python && \
+    curl -sS https://bootstrap.pypa.io/get-pip.py | python3 - --break-system-packages && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN ln -fs /usr/share/zoneinfo/UTC /etc/localtime && \
+    dpkg-reconfigure --frontend noninteractive tzdata
+
+# Install uv for fast Python package management
+RUN curl -LsSf https://astral.sh/uv/install.sh | sh && \
+    mv /root/.local/bin/uv /usr/local/bin/uv
+
+ENV PATH=/usr/local/bin:${PATH}
+ENV PIP_ROOT_USER_ACTION=ignore
+
+# Copy compiled SQLite from builder stage
+COPY --from=sqlite-builder /usr/local/bin/sqlite3 /usr/local/bin/sqlite3
+COPY --from=sqlite-builder /usr/local/lib/libsqlite3.* /usr/local/lib/
+COPY --from=sqlite-builder /usr/local/include/sqlite3*.h /usr/local/include/
+
+# Update library cache and ensure /usr/local/bin is in PATH
+RUN ldconfig && \
+    echo "/usr/local/lib" > /etc/ld.so.conf.d/sqlite3.conf && \
+    ldconfig
+
+ENV PATH="/usr/local/bin:${PATH}"
+
+# This command will check the version and print it to the build logs
+RUN sqlite3 --version
+
+# Install awscli
+RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" && \
+    unzip awscliv2.zip && \
+    ./aws/install && \
+    rm -r aws awscliv2.zip
+
+# Python won't try to write .pyc or .pyo files on the import of source modules
+# Force stdin, stdout and stderr to be totally unbuffered. Good for logging
+ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1 PYTHONIOENCODING=UTF-8 LANG=C.UTF-8 LC_ALL=C.UTF-8
+
+# Install core scientific packages with exact versions
+RUN uv pip install --system --no-cache --break-system-packages \
+    numpy==2.1.0 \
+    scikit-learn==1.4.2 \
+    pyarrow==17.0.0
diff --git a/docker/1.4-2/extension/Dockerfile.cpu b/docker/1.4-2-py312/extension/Dockerfile.cpu
similarity index 94%
rename from docker/1.4-2/extension/Dockerfile.cpu
rename to docker/1.4-2-py312/extension/Dockerfile.cpu
index 8550725e..e9d437be 100644
--- a/docker/1.4-2/extension/Dockerfile.cpu
+++ b/docker/1.4-2-py312/extension/Dockerfile.cpu
@@ -1,4 +1,4 @@
-FROM preprod-sklearn:1.4-2
+FROM preprod-sklearn:1.4-2-py312
 
 RUN pip freeze | grep -q 'scikit-learn==1.4.2'; \
 	if [ $? -eq 0 ]; \
diff --git a/docker/1.4-2/extension/README.md b/docker/1.4-2-py312/extension/README.md
similarity index 100%
rename from docker/1.4-2/extension/README.md
rename to docker/1.4-2-py312/extension/README.md
diff --git a/docker/1.4-2/final/Dockerfile.cpu b/docker/1.4-2-py312/final/Dockerfile.cpu
similarity index 70%
rename from docker/1.4-2/final/Dockerfile.cpu
rename to docker/1.4-2-py312/final/Dockerfile.cpu
index bd7148c9..efe677f1 100644
--- a/docker/1.4-2/final/Dockerfile.cpu
+++ b/docker/1.4-2-py312/final/Dockerfile.cpu
@@ -1,21 +1,29 @@
-FROM sklearn-base:1.4-2
-ENV SAGEMAKER_SKLEARN_VERSION 1.4-2
+FROM sklearn-base:1.4-2-py312
+ENV SAGEMAKER_SKLEARN_VERSION 1.4-2-py312
 ENV PIP_ROOT_USER_ACTION=ignore
 
 LABEL com.amazonaws.sagemaker.capabilities.accept-bind-to-port=true
 
 # Install remaining packages via pip
 COPY requirements.txt /requirements.txt
-RUN uv pip install --system -r /requirements.txt && \
+RUN uv pip install --system --break-system-packages -r /requirements.txt && \
     rm /requirements.txt
 
-# Fix Python 3.10 compatibility for sagemaker-containers
-RUN python3 -c "import sys; import os; site_packages = '/usr/local/lib/python3.10/dist-packages'; mapping_file = os.path.join(site_packages, 'sagemaker_containers/_mapping.py'); exec('if os.path.exists(mapping_file):\\n    with open(mapping_file, \"r\") as f:\\n        content = f.read()\\n    content = content.replace(\"collections.Mapping\", \"collections.abc.Mapping\")\\n    with open(mapping_file, \"w\") as f:\\n        f.write(content)')"
+# Fix Python 3.12 compatibility for sagemaker-containers
+RUN python3 -c "import sys; import os; site_packages = '/usr/local/lib/python3.12/dist-packages'; mapping_file = os.path.join(site_packages, 'sagemaker_containers/_mapping.py'); exec('if os.path.exists(mapping_file):\\n    with open(mapping_file, \"r\") as f:\\n        content = f.read()\\n    content = content.replace(\"collections.Mapping\", \"collections.abc.Mapping\")\\n    with open(mapping_file, \"w\") as f:\\n        f.write(content)')"
 
 COPY dist/sagemaker_sklearn_container-2.0-py3-none-any.whl /sagemaker_sklearn_container-2.0-py3-none-any.whl
-RUN uv pip install --system --no-cache /sagemaker_sklearn_container-2.0-py3-none-any.whl && \
+RUN uv pip install --system --no-cache --break-system-packages /sagemaker_sklearn_container-2.0-py3-none-any.whl && \
     rm /sagemaker_sklearn_container-2.0-py3-none-any.whl
 
+# Force upgrade six to 1.16.0 after all packages are installed to ensure six.moves compatibility
+RUN uv pip install --system --break-system-packages --upgrade --force-reinstall six==1.16.0
+
+# Configure pip to always use --break-system-packages for Python 3.12
+RUN mkdir -p /root/.config/pip && \
+    echo "[global]" > /root/.config/pip/pip.conf && \
+    echo "break-system-packages = true" >> /root/.config/pip/pip.conf
+
 ENV SAGEMAKER_TRAINING_MODULE sagemaker_sklearn_container.training:main
 ENV SAGEMAKER_SERVING_MODULE sagemaker_sklearn_container.serving:main
 
@@ -56,4 +64,4 @@ EXPOSE 8080
 ENV TEMP=/home/model-server/tmp
 
 # Required label for multi-model loading
-LABEL com.amazonaws.sagemaker.capabilities.multi-models=true
+LABEL com.amazonaws.sagemaker.capabilities.multi-models=true
\ No newline at end of file
diff --git a/docker/1.4-2/resources/libffi7_3.3-6_arm64.deb b/docker/1.4-2-py312/resources/libffi7_3.3-6_arm64.deb
similarity index 100%
rename from docker/1.4-2/resources/libffi7_3.3-6_arm64.deb
rename to docker/1.4-2-py312/resources/libffi7_3.3-6_arm64.deb
diff --git a/docker/1.4-2/resources/mms/ExecutionParameters.java b/docker/1.4-2-py312/resources/mms/ExecutionParameters.java
similarity index 100%
rename from docker/1.4-2/resources/mms/ExecutionParameters.java
rename to docker/1.4-2-py312/resources/mms/ExecutionParameters.java
diff --git a/docker/1.4-2/resources/mms/config.properties.tmp b/docker/1.4-2-py312/resources/mms/config.properties.tmp
similarity index 100%
rename from docker/1.4-2/resources/mms/config.properties.tmp
rename to docker/1.4-2-py312/resources/mms/config.properties.tmp
diff --git a/docker/1.4-2/resources/mms/endpoints-1.0.jar b/docker/1.4-2-py312/resources/mms/endpoints-1.0.jar
similarity index 100%
rename from docker/1.4-2/resources/mms/endpoints-1.0.jar
rename to docker/1.4-2-py312/resources/mms/endpoints-1.0.jar
diff --git a/docker/1.4-2/base/Dockerfile.cpu b/docker/1.4-2/base/Dockerfile.cpu
deleted file mode 100644
index 24597f46..00000000
--- a/docker/1.4-2/base/Dockerfile.cpu
+++ /dev/null
@@ -1,193 +0,0 @@
-ARG UBUNTU_VERSION=24.04
-ARG UBUNTU_IMAGE_DIGEST=b359f1067efa76f37863778f7b6d0e8d911e3ee8efa807ad01fbf5dc1ef9006b
-
-# Build stage for SQLite compilation
-FROM ubuntu:${UBUNTU_VERSION}@sha256:${UBUNTU_IMAGE_DIGEST} as sqlite-builder
-RUN apt-get update && apt-get install -y --no-install-recommends \
-        build-essential wget ca-certificates && \
-    cd /tmp && \
-    wget https://www.sqlite.org/2025/sqlite-autoconf-3500200.tar.gz && \
-    tar xzf sqlite-autoconf-3500200.tar.gz && \
-    cd sqlite-autoconf-3500200 && \
-    ./configure --prefix=/usr/local && \
-    make && \
-    make install && \
-    ldconfig && \
-    cd / && \
-    rm -rf /tmp/sqlite-autoconf-3500200 /tmp/sqlite-autoconf-3500200.tar.gz && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
-# MLIO builder stage with Ubuntu 20.04
-FROM ubuntu:20.04@sha256:874aca52f79ae5f8258faff03e10ce99ae836f6e7d2df6ecd3da5c1cad3a912b as mlio-builder
-
-ARG PYTHON_VERSION=3.10
-ARG MLIO_VERSION=v0.9.0
-ARG PYARROW_VERSION=17.0.0
-
-ENV DEBIAN_FRONTEND=noninteractive
-
-# Install uv and Python 3.10
-RUN apt-get update && \
-    apt-get -y install --no-install-recommends \
-        build-essential curl git wget ca-certificates lsb-release software-properties-common && \
-    # Install uv
-    curl -LsSf https://astral.sh/uv/install.sh | sh && \
-    mv /root/.local/bin/uv /usr/local/bin/uv && \
-    # Install Python 3.10 with uv
-    uv python install 3.10 && \
-    ln -sf $(uv python find 3.10) /usr/bin/python3.10 && \
-    update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.10 1
-
-    # Add Apache Arrow repository (hardcoded for Ubuntu 20.04 focal)
-RUN wget https://packages.apache.org/artifactory/arrow/ubuntu/apache-arrow-apt-source-latest-focal.deb && \
-    apt install -y -V ./apache-arrow-apt-source-latest-focal.deb && \
-    apt-get update && \
-    apt-get install -y -V libarrow-dev=17.0.0-1 libarrow-dataset-dev=17.0.0-1 libparquet-dev=17.0.0-1 libarrow-acero-dev=17.0.0-1 && \
-    # MLIO build dependencies
-    wget http://es.archive.ubuntu.com/ubuntu/pool/main/libf/libffi/libffi7_3.3-4_amd64.deb && \
-    dpkg -i libffi7_3.3-4_amd64.deb && \
-    apt-get -y install --no-install-recommends \
-        apt-transport-https gnupg && \
-    wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | \
-        gpg --dearmor - | \
-        tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null && \
-    echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ bionic main' | tee /etc/apt/sources.list.d/kitware.list >/dev/null && \
-    apt-get update && \
-    rm /usr/share/keyrings/kitware-archive-keyring.gpg && \
-    apt-get install -y --no-install-recommends \
-        autoconf automake cmake cmake-data doxygen kitware-archive-keyring libcurl4-openssl-dev libssl-dev libtool ninja-build zlib1g-dev && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
-RUN ln -fs /usr/share/zoneinfo/UTC /etc/localtime && \
-    dpkg-reconfigure --frontend noninteractive tzdata
-
-ENV PIP_ROOT_USER_ACTION=ignore
-
-# Build MLIO from scratch
-# Clone MLIO repository
-RUN cd /tmp && \
-    git clone --branch ${MLIO_VERSION} https://github.com/awslabs/ml-io.git mlio
-
-# Patch MLIO for Arrow 17.0.0
-RUN cd /tmp/mlio && \
-    sed -i 's/find_package(Arrow 14.0.1 REQUIRED/find_package(Arrow 17.0.0 REQUIRED/g' CMakeLists.txt && \
-    sed -i 's/pyarrow==14.0.1/pyarrow==17.0.0/g' src/mlio-py/setup.py
-
-# Build MLIO third-party dependencies (includes Arrow C++)
-RUN cd /tmp/mlio && \
-    build-tools/build-dependency build/third-party all
-
-# Configure MLIO build
-RUN cd /tmp/mlio && \
-    mkdir -p build/release && \
-    cd build/release && \
-    cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_PREFIX_PATH="$(pwd)/../third-party" ../..
-
-# Build MLIO core
-RUN cd /tmp/mlio/build/release && \
-    cmake --build . && \
-    cmake --build . --target install
-
-# Configure MLIO Python extension
-RUN cd /tmp/mlio/build/release && \
-    cmake -DMLIO_INCLUDE_PYTHON_EXTENSION=ON -DPYTHON_EXECUTABLE="/usr/bin/python3" \
-        -DMLIO_INCLUDE_ARROW_INTEGRATION=ON -DCMAKE_PREFIX_PATH="$(pwd)/../third-party" ../..
-
-# Build MLIO Python extension
-RUN cd /tmp/mlio/build/release && \
-    cmake --build . --target mlio-py && \
-    cmake --build . --target mlio-arrow
-
-# Build MLIO Python wheel
-RUN cd /tmp/mlio/src/mlio-py && \
-    uv build
-
-# Copy TBB libraries and MLIO shared libraries to a location we can copy from
-RUN mkdir -p /mlio-artifacts && \
-    cp -r /tmp/mlio/build/third-party/lib/libtbb* /mlio-artifacts/ && \
-    cp /usr/local/lib/libmlio* /mlio-artifacts/ 2>/dev/null || true && \
-    cp /tmp/mlio/src/mlio-py/dist/*.whl /mlio-artifacts/
-
-# Main image
-FROM ubuntu:${UBUNTU_VERSION}@sha256:${UBUNTU_IMAGE_DIGEST}
-
-ARG PYTHON_VERSION=3.10
-ARG PYARROW_VERSION=17.0.0
-
-ENV DEBIAN_FRONTEND=noninteractive
-
-# Install runtime dependencies only
-RUN apt-get update && \
-    apt-get -y upgrade && \
-    apt-get -y install --no-install-recommends \
-        curl git jq libatlas-base-dev nginx openjdk-8-jdk-headless unzip wget expat tzdata apparmor \
-        libgstreamer1.0-0 libxml2 libsqlite3-0 software-properties-common ca-certificates lsb-release \
-        build-essential linux-libc-dev && \
-    # Add Apache Arrow repository for runtime libraries only
-    wget https://packages.apache.org/artifactory/arrow/$(lsb_release --id --short | tr 'A-Z' 'a-z')/apache-arrow-apt-source-latest-$(lsb_release --codename --short).deb && \
-    apt install -y -V ./apache-arrow-apt-source-latest-$(lsb_release --codename --short).deb && \
-    apt-get update && \
-    apt-get install -y -V libarrow-dev=17.0.0-1 libarrow-dataset-dev=17.0.0-1 libparquet-dev=17.0.0-1 libarrow-acero-dev=17.0.0-1 && \
-    # Add deadsnakes PPA for Python 3.10
-    add-apt-repository ppa:deadsnakes/ppa && \
-    apt-get update && \
-    apt-get -y install --no-install-recommends \
-        python3.10 python3.10-distutils python3.10-dev && \
-    update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.10 1 && \
-    # Create python symlink for backward compatibility
-    ln -sf /usr/bin/python3 /usr/bin/python && \
-    curl -sS https://bootstrap.pypa.io/get-pip.py | python3 && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
-RUN ln -fs /usr/share/zoneinfo/UTC /etc/localtime && \
-    dpkg-reconfigure --frontend noninteractive tzdata
-
-# Install uv for fast Python package management
-RUN curl -LsSf https://astral.sh/uv/install.sh | sh && \
-    mv /root/.local/bin/uv /usr/local/bin/uv
-
-ENV PATH=/usr/local/bin:${PATH}
-ENV PIP_ROOT_USER_ACTION=ignore
-
-# Copy MLIO wheel, TBB libraries, and MLIO shared libraries from builder stage
-COPY --from=mlio-builder /mlio-artifacts/*.whl /tmp/
-COPY --from=mlio-builder /mlio-artifacts/libtbb* /usr/local/lib/
-COPY --from=mlio-builder /mlio-artifacts/libmlio* /usr/local/lib/
-
-# Install MLIO wheel
-RUN uv pip install --system /tmp/*.whl && \
-    rm /tmp/*.whl
-
-# Copy compiled SQLite from builder stage
-COPY --from=sqlite-builder /usr/local/bin/sqlite3 /usr/local/bin/sqlite3
-COPY --from=sqlite-builder /usr/local/lib/libsqlite3.* /usr/local/lib/
-COPY --from=sqlite-builder /usr/local/include/sqlite3*.h /usr/local/include/
-
-# Update library cache and ensure /usr/local/bin is in PATH
-RUN ldconfig && \
-    echo "/usr/local/lib" > /etc/ld.so.conf.d/sqlite3.conf && \
-    ldconfig
-
-ENV PATH="/usr/local/bin:${PATH}"
-
-# This command will check the version and print it to the build logs
-RUN sqlite3 --version
-
-# Install awscli
-RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" && \
-    unzip awscliv2.zip && \
-    ./aws/install && \
-    rm -r aws awscliv2.zip
-
-# Python won't try to write .pyc or .pyo files on the import of source modules
-# Force stdin, stdout and stderr to be totally unbuffered. Good for logging
-ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1 PYTHONIOENCODING=UTF-8 LANG=C.UTF-8 LC_ALL=C.UTF-8
-
-# Install core scientific packages with exact versions
-RUN uv pip install --system --no-cache \
-    numpy==2.1.0 \
-    scikit-learn==1.4.2 \
-    pyarrow==17.0.0
diff --git a/pyproject.toml b/pyproject.toml
index af835272..d4ba2969 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,15 +2,15 @@
 name = "sagemaker-sklearn-container"
 version = "2.0"
 description = "SageMaker Scikit-learn Container"
-requires-python = "==3.10.*"
-license = "Apache-2.0"
+requires-python = "==3.12.*"
+license = {text = "Apache-2.0"}
 authors = [{name = "Amazon Web Services"}]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "Natural Language :: English",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.12",
 ]
 dynamic = ["readme", "dependencies", "optional-dependencies"]
 
@@ -31,4 +31,4 @@ where = ["src"]
 exclude = ["test*"]
 
 [tool.setuptools.package-dir]
-"" = "src"
+"" = "src"
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 64d2cc30..f278f923 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ sagemaker-containers==2.8.6.post2
 sagemaker-inference==1.2.0
 sagemaker-training==4.8.0
 setuptools==80.9.0
-six==1.15.0
+six==1.16.0
 urllib3==1.26.17
 Werkzeug==2.0.3
 wheel==0.45.1
diff --git a/setup.py b/setup.py
index 5be88421..fb87e0ee 100644
--- a/setup.py
+++ b/setup.py
@@ -35,6 +35,7 @@ def read(fname):
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.12",
     ],
 
     install_requires=read("requirements.txt"),
@@ -47,5 +48,5 @@ def read(fname):
         'console_scripts': 'serve=sagemaker_sklearn_container.serving:serving_entrypoint'
     },
 
-    python_requires='>=3.10',
+    python_requires='>=3.12',
 )
diff --git a/sklearn-py311-release-checklist.md b/sklearn-py311-release-checklist.md
new file mode 100644
index 00000000..72cb4bb6
--- /dev/null
+++ b/sklearn-py311-release-checklist.md
@@ -0,0 +1,321 @@
+# Scikit-Learn 1.4-2-py311 Release Checklist
+
+## Overview
+This is a special one-time release to upgrade Python 3.10 to Python 3.11 without MLIO support.
+The new image will be tagged as `1.4-2-py311` to avoid overwriting the existing `1.4-2` (py310 with MLIO).
+
+## Critical Safety Measures
+
+### ⚠️ IMPORTANT: Pipeline Blocking Required
+After updating metadata but BEFORE pushing to Alpha, you MUST block the sklearn pipeline to prevent accidental release of py310 image with py311 tags.
+
+---
+
+## Pre-Release Checklist
+
+### Phase 1: Code Changes (GitHub)
+- [x] Update Dockerfiles to Python 3.11
+  - [x] `docker/1.4-2/base/Dockerfile.cpu` - Change `PYTHON_VERSION=3.11`
+  - [x] `docker/1.4-2/final/Dockerfile.cpu` - Update Python 3.11 paths and tag to `1.4-2-py311`
+  - [x] `docker/1.4-2/extension/Dockerfile.cpu` - Update tag to `1.4-2-py311`
+- [x] Remove MLIO build from base Dockerfile
+- [x] Update `pyproject.toml` - Change `requires-python = "==3.11.*"`
+- [x] Update `tox.ini` - Remove mlio-py dependency
+- [ ] Create GitHub PR (branch: `py311-upgrade`)
+- [ ] **DO NOT MERGE YET**
+
+**Note:** Dockerfiles now use `1.4-2-py311` tags to match the final ECR tag that will be created. This ensures:
+- Local builds: `sklearn-base:1.4-2-py311` and `preprod-sklearn:1.4-2-py311`
+- CodeBuild override: `FRAMEWORK_VERSION: "1.4-2-py311"`
+- Final ECR tag: `515193369038.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:1.4-2-py311`
+
+### Phase 2: Local Testing (Dev Account 900597767885)
+- [ ] Build images locally:
+  ```bash
+  docker build -t sklearn-base:1.4-2-py311 -f docker/1.4-2/base/Dockerfile.cpu .
+  python3 setup.py bdist_wheel
+  docker build -t preprod-sklearn:1.4-2-py311 -f docker/1.4-2/final/Dockerfile.cpu .
+  ```
+- [ ] Run unit tests:
+  ```bash
+  docker run --rm -t test-sklearn sh -c 'pytest --cov=sagemaker_sklearn_container --cov-fail-under=60 test/unit'
+  ```
+- [ ] Push to dev account with test tag:
+  ```bash
+  TEST_TAG=jinyali-py311-test
+  docker tag preprod-sklearn:1.4-2-py311 900597767885.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:$TEST_TAG
+  docker push 900597767885.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:$TEST_TAG
+  ```
+- [ ] Run integration tests (see sklearn-integ-test.md)
+- [ ] Verify Python version in container:
+  ```bash
+  docker run --rm -it 900597767885.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:$TEST_TAG python3 --version
+  # Should show: Python 3.11.x
+  ```
+- [ ] Verify MLIO is NOT installed:
+  ```bash
+  docker run --rm -it 900597767885.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:$TEST_TAG python3 -c "import mlio"
+  # Should fail with ModuleNotFoundError
+  ```
+
+---
+
+## Critical Phase: Metadata & Pipeline Changes
+
+### Phase 3: Update Metadata Package (BEFORE CodeBuild)
+
+**Package**: `SMFrameworksSKLearn1_4_2IntegrationTestsMetadata`
+
+- [ ] Update metadata file:
+  ```
+  File: SMFrameworksSKLearn1_4_2IntegrationTestsMetadata/src/SMFrameworksSKLearn1_4_2IntegrationTestsMetadata/src/image
+  
+  Change from:
+  515193369038.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:1.4-2
+  
+  To:
+  515193369038.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:1.4-2-py311
+  ```
+- [ ] Create CR for metadata change
+- [ ] Get approval
+- [ ] **MERGE metadata change**
+
+### Phase 4: Prepare Buildspec Override (DO NOT COMMIT)
+
+**Note**: Since CodeBuild webhook is broken, you'll manually override the buildspec. DO NOT commit this change.
+
+- [ ] Create a local copy of buildspec with py311 changes:
+  ```yaml
+  # Save as: buildspec-py311-override.yml (local file only)
+  
+  env:
+    variables:
+      FRAMEWORK_VERSION: "1.4-2-py311"  # ONLY CHANGE THIS LINE
+      ECR_REGISTRY: "515193369038.dkr.ecr.us-west-2.amazonaws.com"
+      IMAGE_NAME: "sagemaker-scikit-learn"
+  
+  # Keep all other sections unchanged from original buildspec
+  ```
+- [ ] Save this file locally for manual CodeBuild override
+- [ ] **DO NOT create CR or commit this to SMFrameworkContainersCloudFormation**
+
+### Phase 5: 🚨 BLOCK SKLEARN PIPELINE 🚨
+
+**CRITICAL: Do this AFTER metadata merge, BEFORE pushing to Alpha**
+
+- [ ] Navigate to pipeline: https://pipelines.amazon.com/pipelines/SMFrameworksSKLearnECRPromoter-release
+- [ ] Disable automatic triggers or add manual approval gate
+- [ ] Document pipeline state before blocking
+- [ ] Verify pipeline is blocked
+- [ ] **Reason**: Prevent pipeline from picking up old py310 images and tagging them as py311
+
+**How to block pipeline:**
+- Option A: Add manual approval step before deployment stages
+- Option B: Temporarily disable the pipeline
+- Option C: Contact pipeline oncall for assistance
+
+**Pipeline Oncall**: [Add contact info or link]
+
+---
+
+## Release Phase
+
+### Phase 6: Merge GitHub PR
+
+- [ ] Merge GitHub PR to master branch
+- [ ] Verify merge successful
+
+### Phase 7: Trigger CodeBuild with Manual Override
+
+**Since CodeBuild webhook is broken, use manual override:**
+
+- [ ] Go to CodeBuild project in Alpha account (515193369038)
+- [ ] Click "Start build with overrides"
+- [ ] In build configuration:
+  - [ ] Set source to your GitHub PR branch (or master after merge)
+  - [ ] Paste your `buildspec-py311-override.yml` content into buildspec override
+  - [ ] Verify `FRAMEWORK_VERSION: "1.4-2-py311"` is set
+- [ ] Start the build
+- [ ] Monitor build progress in CodeBuild console
+- [ ] Verify build succeeds
+
+### Phase 8: Verify Image in Alpha
+
+- [ ] Check Alpha ECR for new image:
+  ```bash
+  ada credentials update --once --account=515193369038 --provider=isengard --role=Admin
+  aws ecr describe-images --repository-name sagemaker-scikit-learn --region us-west-2 --image-ids imageTag=1.4-2-py311
+  ```
+- [ ] Verify image digest is different from `1.4-2` (py310)
+- [ ] Pull and test image from Alpha:
+  ```bash
+  aws ecr get-login-password --region us-west-2 | docker login --username AWS --password-stdin 515193369038.dkr.ecr.us-west-2.amazonaws.com
+  docker pull 515193369038.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:1.4-2-py311
+  docker run --rm -it 515193369038.dkr.ecr.us-west-2.amazonaws.com/sagemaker-scikit-learn:1.4-2-py311 python3 --version
+  ```
+- [ ] Verify Python 3.11.x
+- [ ] Verify MLIO not available
+
+### Phase 9: 🔓 UNBLOCK SKLEARN PIPELINE
+
+- [ ] Verify image in Alpha is correct (py311, no MLIO)
+- [ ] Re-enable pipeline triggers
+- [ ] Remove manual approval gates (if added)
+- [ ] Document pipeline state after unblocking
+
+### Phase 10: Monitor Pipeline Execution
+
+- [ ] Pipeline detects new image in Alpha
+- [ ] Pipeline reads metadata: `1.4-2-py311`
+- [ ] Verify pipeline generates correct tags:
+  - `1.4-2-py311-1.0.x.x` (with package version)
+  - `1.4-2-py311` (short tag)
+  - `1.4-2-py311-cpu-py3`
+- [ ] Monitor pipeline stages:
+  - [ ] Beta deployment
+  - [ ] Gamma deployment
+  - [ ] Preprod deployment
+  - [ ] Prod deployment
+- [ ] Check for any pipeline failures
+
+---
+
+## Post-Release Verification
+
+### Phase 11: Verify Tags in Production
+
+Check production accounts for correct tags:
+
+**CMH (us-east-2)**: Account `257758044811`
+```bash
+aws ecr describe-images --repository-name sagemaker-scikit-learn --region us-east-2 --image-ids imageTag=1.4-2-py311
+```
+
+**IAD (us-east-1)**: Account `683313688378`
+```bash
+aws ecr describe-images --repository-name sagemaker-scikit-learn --region us-east-1 --image-ids imageTag=1.4-2-py311
+```
+
+- [ ] Verify `1.4-2-py311` exists in prod accounts
+- [ ] Verify `1.4-2` (py310) still exists and unchanged
+- [ ] Verify no tag collision occurred
+
+### Phase 12: Verify No Overlap with Existing Tags
+
+- [ ] Confirm existing `1.4-2` tags are untouched:
+  - `1.4-2` → Still points to py310 image
+  - `1.4-2-cpu-py3` → Still points to py310 image
+  - `1.4-2-1.0.56.0` → Still points to py310 image
+- [ ] Confirm new `1.4-2-py311` tags exist:
+  - `1.4-2-py311` → Points to py311 image
+  - `1.4-2-py311-cpu-py3` → Points to py311 image
+  - `1.4-2-py311-1.0.x.x` → Points to py311 image
+
+### Phase 13: Integration Test in Production
+
+- [ ] Run a test SageMaker training job with `1.4-2-py311`
+- [ ] Verify Python version in job logs
+- [ ] Verify MLIO is not available
+- [ ] Test inference endpoint with `1.4-2-py311`
+
+### Phase 14: Disable MLIO Tests
+
+**Package**: `SMFrameworksSKLearn1_4_2Tests`
+
+- [ ] Comment out or skip MLIO-related tests:
+  - `test_training_parquet.py` - Parquet training tests
+  - `test_network_isolation.py` - Network isolation with MLIO
+- [ ] Create CR for test changes
+- [ ] Merge test changes
+
+---
+
+## Documentation Updates
+
+### Phase 15: Update Documentation
+
+- [ ] Update release notes mentioning py311 variant
+- [ ] Document that `1.4-2-py311` does not include MLIO
+- [ ] Update customer-facing docs (if needed)
+- [ ] Add migration guide for customers moving from `1.4-2` to `1.4-2-py311`
+
+---
+
+## Rollback Plan
+
+### If Issues Occur After Release
+
+**Scenario 1: Wrong tags generated**
+- [ ] Stop pipeline immediately
+- [ ] Revert metadata to `1.4-2`
+- [ ] Delete incorrect tags from ECR
+- [ ] Investigate and fix
+
+**Scenario 2: Pipeline released py310 with py311 tags**
+- [ ] CRITICAL: Stop pipeline immediately
+- [ ] Delete incorrect images from all regions
+- [ ] Revert metadata changes
+- [ ] Re-verify metadata before retry
+
+**Scenario 3: Customer impact**
+- [ ] Identify affected customers
+- [ ] Communicate via AWS Health Dashboard
+- [ ] Provide rollback instructions
+- [ ] Expedite fix
+
+---
+
+## Key Contacts
+
+- **Pipeline Oncall**: [Add link]
+- **SageMaker Algorithms Team**: [Add Slack channel]
+- **Your Alias**: jinyali
+
+---
+
+## Important Notes
+
+### Tag Comparison
+
+**Existing py310 tags (DO NOT TOUCH):**
+- `1.4-2`
+- `1.4-2-cpu-py3`
+- `1.4-2-1.0.56.0`
+
+**New py311 tags (WILL BE CREATED):**
+- `1.4-2-py311`
+- `1.4-2-py311-cpu-py3`
+- `1.4-2-py311-1.0.x.x`
+
+### Why This Approach is Safe
+
+1. Different tag prefix (`1.4-2-py311` vs `1.4-2`)
+2. No string overlap in tag generation logic
+3. Separate image digests in ECR
+4. Customers must explicitly opt-in to py311 variant
+
+### Python 3.10 EOL Timeline
+
+- **Current Date**: February 2026
+- **Python 3.10 EOL**: October 2026 (~8 months)
+- **Strategy**: Focus on py311, only patch py310 for critical issues
+
+---
+
+## Completion Checklist
+
+- [ ] All phases completed successfully
+- [ ] Both image variants coexist in production
+- [ ] No customer impact reported
+- [ ] Documentation updated
+- [ ] Tests updated
+- [ ] Pipeline unblocked and functioning normally
+
+---
+
+## Sign-off
+
+- **Prepared by**: jinyali
+- **Date**: [Fill in]
+- **Reviewed by**: [Fill in]
+- **Approved by**: [Fill in]
diff --git a/test_results.md b/test_results.md
new file mode 100644
index 00000000..956ce36b
--- /dev/null
+++ b/test_results.md
@@ -0,0 +1,74 @@
+# Test Results - Python 3.12 Upgrade
+
+## Environment
+- **Python Version**: 3.12.3
+- **Container Version**: 1.4-2-py312
+- **scikit-learn Version**: 1.4.2
+- **Test Date**: 2026-02-12
+
+## Unit Tests
+
+### Command
+```bash
+docker run --rm -t test-sklearn-container sh -c 'pytest --cov=sagemaker_sklearn_container --cov-fail-under=60 test/unit'
+```
+
+### Results
+- **Status**: ✅ PASSED
+- **Tests Passed**: 43
+- **Tests Failed**: 0
+- **Warnings**: 81
+- **Test Coverage**: 68.44% (Required: 60%)
+- **Execution Time**: 2.75s
+
+### Coverage Details
+| Module | Statements | Missed | Coverage |
+|--------|-----------|--------|----------|
+| `__init__.py` | 0 | 0 | 100% |
+| `exceptions.py` | 28 | 8 | 71% |
+| `handler_service.py` | 27 | 0 | 100% |
+| `mms_patch/__init__.py` | 0 | 0 | 100% |
+| `mms_patch/model_server.py` | 97 | 65 | 33% |
+| `serving.py` | 61 | 10 | 84% |
+| `serving_mms.py` | 60 | 5 | 92% |
+| `training.py` | 9 | 1 | 89% |
+| **TOTAL** | **282** | **89** | **68.44%** |
+
+## Linting
+
+### Command
+```bash
+docker run --rm -t test-sklearn-container sh -c 'flake8 setup.py src test'
+```
+
+### Results
+- **Status**: ✅ PASSED
+- **Issues Found**: 0
+
+## Python 3.12 Compatibility Notes
+
+### Changes Made
+1. **Removed `python3.12-distutils`**: Not available in Python 3.12 (distutils removed per PEP 632)
+2. **Added `--break-system-packages` flag**: Required for Python 3.12 due to PEP 668
+3. **Upgraded `six` to 1.16.0**: Fixed `six.moves` compatibility issue
+4. **Updated `collections.Mapping`**: Changed to `collections.abc.Mapping` for Python 3.12
+
+### Verification
+```bash
+# Python version
+docker run --rm preprod-sklearn:1.4-2-py312 python3 --version
+# Output: Python 3.12.3
+
+# six version and six.moves compatibility
+docker run --rm preprod-sklearn:1.4-2-py312 python3 -c "import six; print(six.__version__); from six.moves import _thread; print('six.moves works')"
+# Output: 1.16.0
+#         six.moves works
+```
+
+## Next Steps
+1. ✅ Unit tests passed
+2. ✅ Linting passed
+3. ⏳ Push to dev account (900597767885) for integration testing
+4. ⏳ Run integration tests per `sklearn-integ-test.md`
+5. ⏳ Create Brazil packages for py312 variant
+6. ⏳ Update pipeline configuration
diff --git a/tox.ini b/tox.ini
index 1613ed13..92232520 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,13 +11,11 @@ deps =
     -r{toxinidir}/test-requirements.txt
 conda_deps=
     pyarrow=14.0.1
-    mlio-py=0.9
 conda_channels=
     conda-forge
-    mlio
 commands =
     pytest --cov=sagemaker_sklearn_container --cov-fail-under=60 test/unit
 
 [testenv:flake8]
 deps = flake8
-commands = flake8 setup.py src test
+commands = flake8 setup.py src test
\ No newline at end of file