diff --git a/.github/docker-images/debian-stretch-arm32v5/Dockerfile b/.github/docker-images/debian-stretch-arm32v5/Dockerfile
deleted file mode 100644
index 2bf44327d..000000000
--- a/.github/docker-images/debian-stretch-arm32v5/Dockerfile
+++ /dev/null
@@ -1,33 +0,0 @@
-FROM arm32v5/debian:stretch-slim
-
-RUN apt-get update -y \
-    && apt-get dist-upgrade -y \
-    && apt-get install -y \
-        sudo \
-        ca-certificates \
-        build-essential \
-        curl \
-        cmake \
-        git \
-        python3-dev \
-        python3-pip \
-        unzip \
-        tar \
-    && cmake --version \
-    && ctest --version
-
-###############################################################################
-# Python/AWS CLI
-###############################################################################
-WORKDIR /tmp
-
-RUN python3 -m pip install setuptools \
-    && python3 -m pip install awscli \
-    && aws --version
-
-###############################################################################
-# Install entrypoint
-###############################################################################
-ADD entrypoint.sh /usr/local/bin/builder
-RUN chmod a+x /usr/local/bin/builder
-ENTRYPOINT ["/usr/local/bin/builder"]
diff --git a/.github/docker-images/debian-stretch-arm32v7/Dockerfile b/.github/docker-images/debian-stretch-arm32v7/Dockerfile
deleted file mode 100644
index 7c7044eaa..000000000
--- a/.github/docker-images/debian-stretch-arm32v7/Dockerfile
+++ /dev/null
@@ -1,33 +0,0 @@
-FROM arm32v7/debian:stretch-slim
-
-RUN apt-get update -y \
-    && apt-get dist-upgrade -y \
-    && apt-get install -y \
-        sudo \
-        ca-certificates \
-        build-essential \
-        curl \
-        cmake \
-        git \
-        python3-dev \
-        python3-pip \
-        unzip \
-        tar \
-    && cmake --version \
-    && ctest --version
-
-###############################################################################
-# Python/AWS CLI
-###############################################################################
-WORKDIR /tmp
-
-RUN python3 -m pip install setuptools \
-    && python3 -m pip install awscli \
-    && aws --version
-
-###############################################################################
-# Install entrypoint
-###############################################################################
-ADD entrypoint.sh /usr/local/bin/builder
-RUN chmod a+x /usr/local/bin/builder
-ENTRYPOINT ["/usr/local/bin/builder"]
diff --git a/.github/docker-images/manylinux2014-aarch64/Dockerfile b/.github/docker-images/manylinux2014-aarch64/Dockerfile
index 16f63ff12..c685b585d 100644
--- a/.github/docker-images/manylinux2014-aarch64/Dockerfile
+++ b/.github/docker-images/manylinux2014-aarch64/Dockerfile
@@ -22,7 +22,7 @@ RUN /opt/python/cp39-cp39/bin/python -m pip install --upgrade setuptools virtual
 ###############################################################################
 # nodejs/npm
 ###############################################################################
-RUN curl -sL https://rpm.nodesource.com/setup_12.x | sudo bash -
+RUN curl -sL https://rpm.nodesource.com/setup_14.x | sudo bash -
 RUN sudo yum -y install nodejs && node --version
 
 ###############################################################################
diff --git a/.github/docker-images/swift-5-al2-x64/Dockerfile b/.github/docker-images/swift-5-al2-x64/Dockerfile
index 358703228..26cae9dde 100644
--- a/.github/docker-images/swift-5-al2-x64/Dockerfile
+++ b/.github/docker-images/swift-5-al2-x64/Dockerfile
@@ -1,5 +1,5 @@
 # https://hub.docker.com/_/swift
-FROM swift:5.5.3-amazonlinux2
+FROM swift:5.7.3-amazonlinux2
 
 ###############################################################################
 # Install prereqs
diff --git a/.github/docker-images/swift-5-centos-x64/Dockerfile b/.github/docker-images/swift-5-centos-x64/Dockerfile
index f5df6b64f..34063a068 100644
--- a/.github/docker-images/swift-5-centos-x64/Dockerfile
+++ b/.github/docker-images/swift-5-centos-x64/Dockerfile
@@ -1,5 +1,5 @@
 # https://hub.docker.com/_/swift
-FROM swift:5.5.3-centos7
+FROM swift:5.7.3-centos7
 
 ###############################################################################
 # Install prereqs
diff --git a/.github/docker-images/swift-5-ubuntu-x64/Dockerfile b/.github/docker-images/swift-5-ubuntu-x64/Dockerfile
index 8b03f5b71..45b2317af 100644
--- a/.github/docker-images/swift-5-ubuntu-x64/Dockerfile
+++ b/.github/docker-images/swift-5-ubuntu-x64/Dockerfile
@@ -1,5 +1,5 @@
 # https://hub.docker.com/_/swift
-FROM swift:5.5.3-focal
+FROM swift:5.7.3-focal
 
 ###############################################################################
 # Install prereqs
diff --git a/.github/docker-images/ubuntu-22-x64/Dockerfile b/.github/docker-images/ubuntu-22-x64/Dockerfile
new file mode 100644
index 000000000..5924fc114
--- /dev/null
+++ b/.github/docker-images/ubuntu-22-x64/Dockerfile
@@ -0,0 +1,47 @@
+FROM ubuntu:22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+###############################################################################
+# Install prereqs
+###############################################################################
+RUN apt-get update -qq \
+    && apt-get -y install \
+    git \
+    curl \
+    sudo \
+    unzip \
+    python3-dev \
+    python3-pip \
+    build-essential \
+    # For PPAs
+    software-properties-common \
+    apt-transport-https \
+    ca-certificates \
+    && apt-get clean
+
+###############################################################################
+# Python/AWS CLI
+###############################################################################
+WORKDIR /tmp
+
+RUN python3 -m pip install setuptools \
+    && curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o awscliv2.zip \
+    && unzip awscliv2.zip \
+    && sudo aws/install \
+    && aws --version
+
+###############################################################################
+# Install pre-built CMake
+###############################################################################
+RUN curl -sSL https://d19elf31gohf1l.cloudfront.net/_binaries/cmake/cmake-3.13-manylinux1-x64.tar.gz -o cmake.tar.gz \
+    && tar xvzf cmake.tar.gz -C /usr/local \
+    && cmake --version \
+    && rm -f /tmp/cmake.tar.gz
+
+###############################################################################
+# Install entrypoint
+###############################################################################
+ADD entrypoint.sh /usr/local/bin/builder
+RUN chmod a+x /usr/local/bin/builder
+ENTRYPOINT ["/usr/local/bin/builder"]
diff --git a/.github/workflows/create-channel.yml b/.github/workflows/create-channel.yml
index 9fa1bdd7b..8f325ce57 100644
--- a/.github/workflows/create-channel.yml
+++ b/.github/workflows/create-channel.yml
@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
@@ -71,8 +71,7 @@ jobs:
         - ubuntu-18-x64
         - ubuntu-20-x64
         - ubuntu-20-aarch64
-        - debian-stretch-arm32v5
-        - debian-stretch-arm32v7
+        - ubuntu-22-x64
         - node-10-linux-x64
         - swift-5-al2-x64
         - swift-5-centos-x64
@@ -80,7 +79,6 @@ jobs:
         - rhel8-x64
         - opensuse-leap
         - fedora-34-x64
-        - raspbian-bullseye
         - alpine-3.16-x64
         - alpine-3.16-x86
         - alpine-3.16-arm64
@@ -90,7 +88,7 @@ jobs:
 
     steps:
     - name: Checkout Sources
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
@@ -126,3 +124,35 @@ jobs:
       run: |
         export IMAGE_TAG=${{ steps.tag.outputs.release_tag }}
         docker push ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:$IMAGE_TAG
+
+  # The job will directly pull the image from the latest, and push to the new tag.
+  # This job is only for a temporary fix. The cheated image would not get updated.
+  passthrough-images:
+    name: ${{ matrix.variant }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        variant:
+        - raspbian-bullseye
+
+    steps:
+    - name: Checkout Sources
+      uses: actions/checkout@v4
+
+    - name: Get release tag
+      uses: ./.github/actions/release-tag
+      id: tag
+
+    - name: Login to docker repo
+      run: aws ecr get-login-password --region us-east-1 | docker login ${{ secrets.AWS_ECR_REPO }} -u AWS --password-stdin
+
+    - name: Pull latest image and push
+      run: |
+        if ! aws --region us-east-1 ecr describe-repositories --repository-names aws-crt-${{ matrix.variant }} > /dev/null 2>&1; then \
+          exit 1
+        fi
+        export IMAGE_TAG=${{ steps.tag.outputs.release_tag }}
+        docker pull ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:latest
+        docker tag ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:latest ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:$IMAGE_TAG
+        docker push ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:$IMAGE_TAG
diff --git a/.github/workflows/create-release.yml b/.github/workflows/create-release.yml
index 736e519a9..601c3d7b2 100644
--- a/.github/workflows/create-release.yml
+++ b/.github/workflows/create-release.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
@@ -65,8 +65,6 @@ jobs:
         - ubuntu-18-x64
         - ubuntu-20-x64
         - ubuntu-20-aarch64
-        - debian-stretch-arm32v5
-        - debian-stretch-arm32v7
         - node-10-linux-x64
         - swift-5-al2-x64
         - swift-5-centos-x64
@@ -74,7 +72,6 @@ jobs:
         - rhel8-x64
         - opensuse-leap
         - fedora-34-x64
-        - raspbian-bullseye
         - alpine-3.16-x64
         - alpine-3.16-x86
         - alpine-3.16-arm64
@@ -84,7 +81,7 @@ jobs:
 
     steps:
     - name: Checkout Sources
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
@@ -132,13 +129,45 @@ jobs:
         | aws s3 cp - s3://${{env.AWS_S3_BUCKET}}/releases/$IMAGE_TAG/aws-crt-${{ matrix.variant }}.tar.gz
         aws s3 cp s3://${{env.AWS_S3_BUCKET}}/releases/$IMAGE_TAG/aws-crt-${{ matrix.variant }}.tar.gz s3://${{env.AWS_S3_BUCKET}}/LATEST/aws-crt-${{ matrix.variant }}.tar.gz
 
+  # The job will directly pull the image from the latest, and push to the new tag.
+  # This job is only for a temporary fix. The image would not get updated.
+  passthrough-images:
+    name: ${{ matrix.variant }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        variant:
+        - raspbian-bullseye
+
+    steps:
+    - name: Checkout Sources
+      uses: actions/checkout@v4
+
+    - name: Get release tag
+      uses: ./.github/actions/release-tag
+      id: tag
+
+    - name: Login to docker repo
+      run: aws ecr get-login-password --region us-east-1 | docker login ${{ secrets.AWS_ECR_REPO }} -u AWS --password-stdin
+
+    - name: Pull latest image and push
+      run: |
+        if ! aws --region us-east-1 ecr describe-repositories --repository-names aws-crt-${{ matrix.variant }} > /dev/null 2>&1; then \
+          exit 1
+        fi
+        export IMAGE_TAG=${{ steps.tag.outputs.release_tag }}
+        docker pull ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:latest
+        docker tag ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:latest ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:$IMAGE_TAG
+        docker push ${{ secrets.AWS_ECR_REPO }}/aws-crt-${{ matrix.variant }}:$IMAGE_TAG
+
   upload-ci-script:
     name: Upload container ci script
     runs-on: ubuntu-latest
 
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
diff --git a/.github/workflows/handle-stale-discussions.yml b/.github/workflows/handle-stale-discussions.yml
new file mode 100644
index 000000000..5b16398cf
--- /dev/null
+++ b/.github/workflows/handle-stale-discussions.yml
@@ -0,0 +1,19 @@
+name: HandleStaleDiscussions
+on:
+  schedule:
+    - cron: '0 */4 * * *'
+  discussion_comment:
+    types: [created]
+
+jobs:
+  handle-stale-discussions:
+    name: Handle stale discussions
+    runs-on: ubuntu-latest
+    permissions:
+      discussions: write
+    steps:
+      - name: Stale discussions action
+        uses: aws-github-ops/handle-stale-discussions@v1
+        env:
+          GITHUB_TOKEN:  ${{secrets.GITHUB_TOKEN}}
+
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 5926159da..77d1f0e26 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Build and Test
       run: |
diff --git a/.github/workflows/linux-container-ci.sh b/.github/workflows/linux-container-ci.sh
index 0cb5b1ee8..03fd2612a 100755
--- a/.github/workflows/linux-container-ci.sh
+++ b/.github/workflows/linux-container-ci.sh
@@ -11,4 +11,4 @@ shift
 
 aws ecr get-login-password | docker login 123124136734.dkr.ecr.us-east-1.amazonaws.com -u AWS --password-stdin
 export DOCKER_IMAGE=123124136734.dkr.ecr.us-east-1.amazonaws.com/${IMAGE_NAME}:${BUILDER_VERSION}
-docker run --env GITHUB_REF --env GITHUB_HEAD_REF --env AWS_ACCESS_KEY_ID --env AWS_SECRET_ACCESS_KEY --env AWS_DEFAULT_REGION --env CXXFLAGS --env AWS_CRT_ARCH $DOCKER_IMAGE --version=${BUILDER_VERSION} $@
+docker run --env GITHUB_REF --env GITHUB_HEAD_REF --env AWS_ACCESS_KEY_ID --env AWS_SECRET_ACCESS_KEY --env AWS_DEFAULT_REGION --env CXXFLAGS --env AWS_CRT_ARCH --env CTEST_PARALLEL_LEVEL $DOCKER_IMAGE --version=${BUILDER_VERSION} $@
diff --git a/.github/workflows/sanity-test.yml b/.github/workflows/sanity-test.yml
index 92cd84070..ae905c121 100644
--- a/.github/workflows/sanity-test.yml
+++ b/.github/workflows/sanity-test.yml
@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Run Tests
       run: python3 -m unittest discover tests --verbose
@@ -42,7 +42,7 @@ jobs:
 
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
@@ -78,12 +78,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        host: [ubuntu-20.04, macos-11, macos-12, windows-2022]
+        host: [ubuntu-22.04, macos-11, macos-12, windows-2022]
     needs: package
     runs-on: ${{ matrix.host }}
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install builder
       uses: actions/download-artifact@v3
@@ -145,7 +145,7 @@ jobs:
 
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install builder
       uses: actions/download-artifact@v3
@@ -183,7 +183,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install builder
       uses: actions/download-artifact@v3
@@ -205,7 +205,7 @@ jobs:
         std: [c++11, c++14, c++17, c++2a]
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install builder
       uses: actions/download-artifact@v3
@@ -255,7 +255,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install builder
       uses: actions/download-artifact@v3
@@ -284,7 +284,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
@@ -317,7 +317,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout Source
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Get release tag
       uses: ./.github/actions/release-tag
diff --git a/builder/actions/setup_cross_ci_crt_environment.py b/builder/actions/setup_cross_ci_crt_environment.py
index db3efaaa8..f0dc953fd 100644
--- a/builder/actions/setup_cross_ci_crt_environment.py
+++ b/builder/actions/setup_cross_ci_crt_environment.py
@@ -205,6 +205,8 @@ def _common_setup(self, env):
                             "ci/mqtt5/us/authorizer/signed/tokenkeyname")
         self._setenv_secret(env, "AWS_TEST_MQTT5_IOT_CORE_SIGNING_AUTHORIZER_TOKEN_SIGNATURE",
                             "ci/mqtt5/us/authorizer/signed/signature")
+        self._setenv_secret(env, "AWS_TEST_MQTT5_IOT_CORE_SIGNING_AUTHORIZER_TOKEN_SIGNATURE_UNENCODED",
+                            "ci/mqtt5/us/authorizer/signed/signature/unencoded")
 
         # JAVA KEYSTORE (Java uses PKCS#8 keys internally, which currently only Linux supports ATM)
         if (self.is_linux == True):
@@ -291,6 +293,8 @@ def _common_setup(self, env):
                             "ci/mqtt5/us/authorizer/signed/tokenkeyname")
         self._setenv_secret(env, "AWS_TEST_MQTT311_IOT_CORE_SIGNING_AUTHORIZER_TOKEN_SIGNATURE",
                             "ci/mqtt5/us/authorizer/signed/signature")
+        self._setenv_secret(env, "AWS_TEST_MQTT311_IOT_CORE_SIGNING_AUTHORIZER_TOKEN_SIGNATURE_UNENCODED",
+                            "ci/mqtt5/us/authorizer/signed/signature/unencoded")
 
         # JAVA KEYSTORE (Java uses PKCS#8 keys internally, which currently only Linux supports ATM)
         if (self.is_linux == True):
diff --git a/builder/actions/setup_cross_ci_helpers.py b/builder/actions/setup_cross_ci_helpers.py
index 1419f92ee..968426028 100644
--- a/builder/actions/setup_cross_ci_helpers.py
+++ b/builder/actions/setup_cross_ci_helpers.py
@@ -215,7 +215,7 @@ def _get_token_slots(env):
 
 def _get_softhsm2_version(env):
     output = _exec_softhsm2_util(env, '--version').output
-    match = re.match('([0-9+])\.([0-9]+).([0-9]+)', output)
+    match = re.match(r'([0-9+])\.([0-9]+).([0-9]+)', output)
     return (int(match.group(1)), int(match.group(2)), int(match.group(3)))
 
 ################################################################################
diff --git a/builder/core/toolchain.py b/builder/core/toolchain.py
index 97ab4020a..c33fc9815 100644
--- a/builder/core/toolchain.py
+++ b/builder/core/toolchain.py
@@ -17,19 +17,19 @@ def _compiler_version(cc):
 
         for text in lines:
             # Apple clang
-            m = re.match('Apple (LLVM|clang) version (\d+)', text)
+            m = re.match(r'Apple (LLVM|clang) version (\d+)', text)
             if m:
                 return 'appleclang', m.group(2)
             # LLVM clang
-            m = re.match('.*(LLVM|clang) version (\d+)', text)
+            m = re.match(r'.*(LLVM|clang) version (\d+)', text)
             if m:
                 return 'clang', m.group(2)
             # GCC 4.x
-            m = re.match('gcc .+ (4\.\d+)', text)
+            m = re.match(r'gcc .+ (4\.\d+)', text)
             if m:
                 return 'gcc', m.group(1)
             # GCC 5+
-            m = re.match('gcc .+ (\d+)\.', text)
+            m = re.match(r'gcc .+ (\d+)\.', text)
             if m:
                 return 'gcc', m.group(1)
     return None, None
diff --git a/builder/imports/llvm.py b/builder/imports/llvm.py
index ccb932fb7..7a2372fc6 100644
--- a/builder/imports/llvm.py
+++ b/builder/imports/llvm.py
@@ -130,7 +130,7 @@ def install(self, env):
         sudo = ['sudo'] if sudo else []
 
         # Strip minor version info
-        version = env.toolchain.compiler_version.replace('\..+', '')
+        version = env.toolchain.compiler_version.replace(r'\..+', '')
 
         script = tempfile.NamedTemporaryFile(delete=False)
         script_path = script.name
diff --git a/builder/imports/nodejs.py b/builder/imports/nodejs.py
index 0d395af35..36ff88266 100644
--- a/builder/imports/nodejs.py
+++ b/builder/imports/nodejs.py
@@ -14,7 +14,7 @@
 import re
 
 
-NVM = """\
+NVM = r"""\
 #!/usr/bin/env bash
 export NVM_DIR="$HOME/.nvm"
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
@@ -126,7 +126,7 @@ def install_node_via_unofficial_build(self, env):
         # Normaliz version format, please note 12.16.3 is the last version has x86 support
         def normalize_version(v):
             append_times = 0
-            while re.match('^([0-9]+\.){2}[0-9]+$', v) == None:
+            while re.match(r'^([0-9]+\.){2}[0-9]+$', v) == None:
                 # Only try append sub version twice
                 if append_times < 2:
                     v += ".0"