diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
index 65829bd4..8be9f44c 100644
--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -18,21 +18,21 @@ jobs:
       VCPKG_OVERLAY_PORTS: "${{ github.workspace }}/ports"
       VCPKG_OVERLAY_TRIPLETS: ${{ github.workspace }}/triplets
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.1
       - name: "create cache folders"
         run: |
           mkdir -p ${VCPKG_DOWNLOADS}
           mkdir -p ${VCPKG_DEFAULT_BINARY_CACHE}
-      - uses: actions/cache@v3
+      - uses: actions/cache@v3.3.2
         with:
-          key: "v2339-${{ runner.os }}-${{ matrix.triplet }}"
+          key: "v2351-${{ runner.os }}-${{ matrix.triplet }}"
           path: |
             /usr/local/share/vcpkg-downloads
             /usr/local/share/vcpkg-archives
-      - uses: ConorMacBride/install-package@v1
+      - uses: ConorMacBride/install-package@v1.1.0
         with:
           brew: ninja autoconf automake libtool
-      - uses: lukka/run-vcpkg@v11
+      - uses: lukka/run-vcpkg@v11.3
         with:
           vcpkgDirectory: "/usr/local/share/vcpkg" # see VCPKG_INSTALLATION_ROOT
           vcpkgGitCommitId: "a42af01b72c28a8e1d7b48107b33e4f286a55ef6" # 2023.11.20
diff --git a/.github/workflows/build-ubuntu.yml b/.github/workflows/build-ubuntu.yml
index 6445d3a8..9919834c 100644
--- a/.github/workflows/build-ubuntu.yml
+++ b/.github/workflows/build-ubuntu.yml
@@ -17,7 +17,7 @@ jobs:
       VCPKG_OVERLAY_PORTS: "${{ github.workspace }}/ports"
       VCPKG_OVERLAY_TRIPLETS: ${{ github.workspace }}/triplets
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4.1.1
       - name: "create cache folders"
         run: |
           mkdir -p ${VCPKG_DOWNLOADS}
@@ -25,16 +25,16 @@ jobs:
         env:
           VCPKG_DOWNLOADS: "${{ runner.temp }}/vcpkg-downloads"
           VCPKG_DEFAULT_BINARY_CACHE: "${{ runner.temp }}/vcpkg-archives"
-      - uses: actions/cache@v3
+      - uses: actions/cache@v3.3.2
         with:
-          key: "v2339-${{ runner.os }}-${{ matrix.triplet }}"
+          key: "v2351-${{ runner.os }}-${{ matrix.triplet }}"
           path: |
             ${{ runner.temp }}/vcpkg-downloads
             ${{ runner.temp }}/vcpkg-archives
-      - uses: ConorMacBride/install-package@v1
+      - uses: ConorMacBride/install-package@v1.1.0
         with:
           apt: nuget nasm libnuma-dev libopenmpi-dev libx11-dev libxi-dev libxext-dev libx11-xcb-dev
-      - uses: lukka/run-vcpkg@v11
+      - uses: lukka/run-vcpkg@v11.3
         with:
           vcpkgDirectory: "/usr/local/share/vcpkg" # see VCPKG_INSTALLATION_ROOT
           doNotUpdateVcpkg: true
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index 5b46aae9..e37bb0aa 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -22,13 +22,13 @@ jobs:
         run: |
           New-Item -Type Directory -Force ${env:VCPKG_DOWNLOADS}
           New-Item -Type Directory -Force ${env:VCPKG_DEFAULT_BINARY_CACHE}
-      - uses: actions/cache@v3
+      - uses: actions/cache@v3.3.2
         with:
-          key: "v2339-${{ runner.os }}-${{ matrix.triplet }}"
+          key: "v2351-${{ runner.os }}-${{ matrix.triplet }}"
           path: |
             C:/vcpkg/downloads
             C:/vcpkg/archives
-      - uses: microsoft/setup-msbuild@v1.1
+      - uses: microsoft/setup-msbuild@v1.3.1
         with:
           msbuild-architecture: x64
       - uses: lukka/run-vcpkg@v11.3
@@ -44,7 +44,7 @@ jobs:
   cuda_x64:
     runs-on: ["self-hosted", "Windows", "CUDA"]
     continue-on-error: true
-    timeout-minutes: 60
+    timeout-minutes: 180
     env:
       VCPKG_DOWNLOADS: "C:/vcpkg/downloads"
       VCPKG_DEFAULT_BINARY_CACHE: "C:/vcpkg/archives"
@@ -57,7 +57,7 @@ jobs:
           New-Item -Type Directory -Force ${env:VCPKG_DOWNLOADS}
           New-Item -Type Directory -Force ${env:VCPKG_DEFAULT_BINARY_CACHE}
           Move-Item -Path "test/self-hosted-cuda.json" -Destination "test/vcpkg.json" -Force
-      - uses: microsoft/setup-msbuild@v1.1
+      - uses: microsoft/setup-msbuild@v1.3.1
         with:
           msbuild-architecture: x64
       - uses: lukka/run-vcpkg@v11.3
@@ -70,6 +70,6 @@ jobs:
         env:
           VCPKG_DEFAULT_TRIPLET: "x64-windows"
 
-      - uses: yumis-coconudge/clean-workspace-action@v1
+      - uses: yumis-coconudge/clean-workspace-action@v1.0.5
         with:
           additional-path: "C:/vcpkg/installed"
diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 981dafe2..f946a394 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -22,8 +22,8 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4.1.1
+      - uses: actions/setup-python@v5.0.0
         with:
           python-version: 3.11
           architecture: x64
@@ -35,8 +35,8 @@ jobs:
         run: >
           python3 -m mkdocs build --site-dir _site
 
-      - uses: actions/configure-pages@v3
-      - uses: actions/upload-pages-artifact@v2
+      - uses: actions/configure-pages@v4.0.0
+      - uses: actions/upload-pages-artifact@v3.0.0
         with:
           path: '_site'
-      - uses: actions/deploy-pages@v2
+      - uses: actions/deploy-pages@v4.0.0
diff --git a/README.md b/README.md
index b44ac50c..5e0dd3ef 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 Targets...
 
-* [vcpkg](https://github.com/microsoft/vcpkg): recommend [2023.06.20](https://github.com/microsoft/vcpkg/releases/tag/2023.06.20) or later
+* [vcpkg](https://github.com/microsoft/vcpkg): recommend [2023.10.19](https://github.com/microsoft/vcpkg/releases/tag/2023.10.19) or later
 * [vcpkg-tool](https://github.com/microsoft/vcpkg-tool) follows the vcpkg
 
 ### References
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index d2b4eefd..631d0b86 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -1,7 +1,7 @@
 #
 # https://docs.microsoft.com/en-us/azure/devops/pipelines/yaml-schema
 # https://docs.microsoft.com/en-us/azure/devops/pipelines/build/variables
-# https://github.com/actions/virtual-environments/tree/main/images
+# https://github.com/actions/runner-images/tree/main/images
 # https://github.com/lukka/CppBuildTasks
 #
 
@@ -38,7 +38,7 @@ stages:
       - job: "triplet_ios_simulator"
         displayName: "iOS Simulator"
         pool:
-          vmImage: macOS-12
+          vmImage: macOS-13
         variables:
           - name: vcpkg.overlay.triplets # VCPKG_OVERLAY_TRIPLETS
             value: $(Build.SourcesDirectory)/triplets # --overlay-triplets $(Build.SourcesDirectory)/triplets
@@ -47,16 +47,16 @@ stages:
             displayName: "Install HomeBrew packages"
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: run-vcpkg@0
-            displayName: "arm64-ios-simulator: zlib-ng"
+            displayName: "arm64-ios-simulator"
             inputs:
-              vcpkgArguments: "zlib-ng --debug"
+              vcpkgArguments: "zlib-ng"
               vcpkgGitCommitId: $(vcpkg.commit)
             env:
               VCPKG_DEFAULT_TRIPLET: arm64-ios-simulator
           - task: run-vcpkg@0
-            displayName: "x64-ios-simulator: zlib-ng"
+            displayName: "x64-ios-simulator"
             inputs:
-              vcpkgArguments: "zlib-ng --debug"
+              vcpkgArguments: "zlib-ng"
               vcpkgGitCommitId: $(vcpkg.commit)
             env:
               VCPKG_DEFAULT_TRIPLET: x64-ios-simulator
@@ -67,7 +67,7 @@ stages:
       - job: "osx_host_tools"
         displayName: "MacTools"
         pool:
-          vmImage: macOS-12
+          vmImage: macOS-13
         timeoutInMinutes: "120"
         steps:
           - powershell: brew install autoconf automake libtool pkg-config
@@ -75,9 +75,9 @@ stages:
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: Cache@2
             inputs:
-              key: '"v2349-bin-mac-host"'
+              key: '"v2351-bin-mac-host"'
               restoreKeys: |
-                "v2349-bin-mac-host"
+                "v2351-bin-mac-host"
               path: $(vcpkg.default.binary.cache)
           - task: run-vcpkg@0
             displayName: "coreml-tools"
@@ -103,65 +103,6 @@ stages:
   - stage: "Ports"
     dependsOn: "Triplets"
     jobs:
-      - job: "port_windows"
-        displayName: "Windows"
-        pool:
-          vmImage: windows-2022
-        strategy:
-          matrix:
-            x64_windows:
-              vcpkg.default.triplet: "x64-windows"
-            x86_windows:
-              vcpkg.default.triplet: "x86-windows"
-            x64_uwp:
-              vcpkg.default.triplet: "x64-uwp"
-        steps:
-          - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
-          - task: Cache@2
-            inputs:
-              key: '"v2349-down-windows"'
-              restoreKeys: |
-                "v2349-down-windows"
-              path: $(Build.BinariesDirectory)/vcpkg/downloads
-          - task: Cache@2
-            inputs:
-              key: '"v2349-bin-windows" | "$(vcpkg.default.triplet)"'
-              restoreKeys: |
-                "v2349-bin-windows" | "$(vcpkg.default.triplet)"
-              path: $(vcpkg.default.binary.cache)
-          - task: run-vcpkg@0
-            displayName: "libdispatch"
-            inputs:
-              vcpkgArguments: "libdispatch"
-              vcpkgGitCommitId: $(vcpkg.commit)
-            condition: ne(variables['vcpkg.default.triplet'], 'x64-uwp')
-          - task: run-vcpkg@0
-            displayName: "tensorflow-lite"
-            inputs:
-              vcpkgArguments: "tensorflow-lite[google-angle,gpu]"
-              vcpkgGitCommitId: $(vcpkg.commit)
-            condition: ne(variables['vcpkg.default.triplet'], 'x64-uwp')
-          - task: run-vcpkg@0
-            inputs:
-              vcpkgArguments: "cpuinfo"
-              vcpkgGitCommitId: $(vcpkg.commit)
-          - task: CopyFiles@2
-            displayName: "Copy logs in buildtrees"
-            inputs:
-              SourceFolder: "$(Build.BinariesDirectory)/vcpkg/buildtrees/"
-              Contents: |
-                **/?(*.log|*.txt|*.cmake)
-              TargetFolder: "$(Build.ArtifactStagingDirectory)/log"
-              OverWrite: true
-            condition: always()
-          - task: PublishBuildArtifacts@1
-            displayName: "Publish logs"
-            inputs:
-              PathtoPublish: "$(Build.ArtifactStagingDirectory)/log"
-              ArtifactName: "$(Agent.JobName)"
-            condition: always()
-        timeoutInMinutes: "500"
-
       - job: "port_windows_arm"
         displayName: "Windows(ARM)"
         pool:
@@ -176,24 +117,22 @@ stages:
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: Cache@2
             inputs:
-              key: '"v2349-down-uwp"'
+              key: '"v2351-down-uwp"'
               restoreKeys: |
-                "v2349-down-uwp"
+                "v2351-down-uwp"
               path: $(Build.BinariesDirectory)/vcpkg/downloads
           - task: Cache@2
             inputs:
-              key: '"v2349-bin-uwp" | "$(vcpkg.default.triplet)"'
+              key: '"v2351-bin-uwp" | "$(vcpkg.default.triplet)"'
               restoreKeys: |
-                "v2349-bin-uwp" | "$(vcpkg.default.triplet)"
+                "v2351-bin-uwp" | "$(vcpkg.default.triplet)"
               path: $(vcpkg.default.binary.cache)
           - task: run-vcpkg@0
-            displayName: "libdispatch"
             inputs:
               vcpkgArguments: "libdispatch"
               vcpkgGitCommitId: $(vcpkg.commit)
             condition: ne(variables['vcpkg.default.triplet'], 'arm64-uwp')
           - task: run-vcpkg@0
-            displayName: "tensorflow-lite"
             inputs:
               vcpkgArguments: "tensorflow-lite"
               vcpkgGitCommitId: $(vcpkg.commit)
@@ -220,39 +159,33 @@ stages:
           vmImage: ubuntu-22.04
         strategy:
           matrix:
-            x64_clang14:
+            x64_clang15:
               vcpkg.default.triplet: "x64-linux"
-              cc: clang-14
-              cxx: clang++-14
-            x64_gcc11:
+              cc: clang-15
+              cxx: clang++-15
+            x64_gcc13:
               vcpkg.default.triplet: "x64-linux"
-              cc: gcc-11
-              cxx: g++-11
+              cc: gcc-13
+              cxx: g++-13
         steps:
           - powershell: sudo apt-get install -y nuget nasm libnuma-dev libopenmpi-dev libx11-dev libxi-dev libxext-dev libx11-xcb-dev
             displayName: "Install APT packages"
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: Cache@2
             inputs:
-              key: '"v2349-down-ubuntu"'
+              key: '"v2351-down-ubuntu"'
               restoreKeys: |
-                "v2349-down-ubuntu"
+                "v2351-down-ubuntu"
               path: $(Build.BinariesDirectory)/vcpkg/downloads
           - task: Cache@2
             inputs:
-              key: '"v2349-bin-ubuntu" | "$(vcpkg.default.triplet)_$(cc)"'
+              key: '"v2351-bin-ubuntu" | "$(vcpkg.default.triplet)_$(cc)"'
               restoreKeys: |
-                "v2349-bin-ubuntu" | "$(vcpkg.default.triplet)_$(cc)"
+                "v2351-bin-ubuntu" | "$(vcpkg.default.triplet)_$(cc)"
               path: $(vcpkg.default.binary.cache)
           - task: run-vcpkg@0
-            displayName: "tensorflow-lite"
-            inputs:
-              vcpkgArguments: "tensorflow-lite[gpu]"
-              vcpkgGitCommitId: $(vcpkg.commit)
-          - task: run-vcpkg@0
-            displayName: "onnxruntime"
             inputs:
-              vcpkgArguments: "onnxruntime[xnnpack]"
+              vcpkgArguments: "tensorflow-lite[gpu] onnxruntime[xnnpack]"
               vcpkgGitCommitId: $(vcpkg.commit)
           - task: CopyFiles@2
             displayName: "Copy logs in buildtrees"
@@ -277,29 +210,29 @@ stages:
           vmImage: ubuntu-22.04
         strategy:
           matrix:
-            arm64_ndk25:
+            arm64_ndk26:
               vcpkg.default.triplet: "arm64-android"
-              android.ndk.home: "/usr/local/lib/android/sdk/ndk/25.2.9519653"
-            x64_ndk25:
+              android.ndk.home: "/usr/local/lib/android/sdk/ndk/26.1.10909125"
+            x64_ndk26:
               vcpkg.default.triplet: "x64-android"
-              android.ndk.home: "/usr/local/lib/android/sdk/ndk/25.2.9519653"
+              android.ndk.home: "/usr/local/lib/android/sdk/ndk/26.1.10909125"
         steps:
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: Cache@2
             inputs:
-              key: '"v2349-down-android"'
+              key: '"v2351-down-android"'
               restoreKeys: |
-                "v2349-down-android"
+                "v2351-down-android"
               path: $(Build.BinariesDirectory)/vcpkg/downloads
           - task: Cache@2
             inputs:
-              key: '"v2349-bin-android" | "$(vcpkg.default.triplet)"'
+              key: '"v2351-bin-android" | "$(vcpkg.default.triplet)"'
               restoreKeys: |
-                "v2349-bin-android" | "$(vcpkg.default.triplet)"
+                "v2351-bin-android" | "$(vcpkg.default.triplet)"
               path: $(vcpkg.default.binary.cache)
           - task: run-vcpkg@0
             inputs:
-              vcpkgArguments: "openssl3 libdispatch fft2d farmhash ruy eigen3 google-jni-bind"
+              vcpkgArguments: "openssl3 libdispatch google-jni-bind tensorflow-lite[gpu]"
               vcpkgGitCommitId: $(vcpkg.commit)
             env:
               VCPKG_OVERLAY_TRIPLETS: $(Build.SourcesDirectory)/triplets
@@ -323,7 +256,7 @@ stages:
       - job: "port_osx"
         displayName: "Mac"
         pool:
-          vmImage: macOS-12
+          vmImage: macOS-13
         strategy:
           matrix:
             arm64_osx:
@@ -344,29 +277,19 @@ stages:
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: Cache@2
             inputs:
-              key: '"v2349-down-apple"'
+              key: '"v2351-down-apple"'
               restoreKeys: |
-                "v2349-down-apple"
+                "v2351-down-apple"
               path: $(Build.BinariesDirectory)/vcpkg/downloads
           - task: Cache@2
             inputs:
-              key: '"v2349-bin-osx" | "$(vcpkg.default.triplet)"'
+              key: '"v2351-bin-osx" | "$(vcpkg.default.triplet)"'
               restoreKeys: |
-                "v2349-bin-osx" | "$(vcpkg.default.triplet)"
+                "v2351-bin-osx" | "$(vcpkg.default.triplet)"
               path: $(vcpkg.default.binary.cache)
           - task: run-vcpkg@0
             inputs:
-              vcpkgArguments: "metal-cpp"
-              vcpkgGitCommitId: $(vcpkg.commit)
-          - task: run-vcpkg@0
-            displayName: "tensorflow-lite"
-            inputs:
-              vcpkgArguments: "tensorflow-lite[gpu]"
-              vcpkgGitCommitId: $(vcpkg.commit)
-          - task: run-vcpkg@0
-            displayName: "onnxruntime"
-            inputs:
-              vcpkgArguments: "onnxruntime[xnnpack,coreml]"
+              vcpkgArguments: "tensorflow-lite[gpu] onnxruntime[xnnpack,coreml]"
               vcpkgGitCommitId: $(vcpkg.commit)
           - task: CopyFiles@2
             displayName: "Copy logs in buildtrees"
@@ -388,7 +311,7 @@ stages:
       - job: "port_ios"
         displayName: "iOS"
         pool:
-          vmImage: macOS-12
+          vmImage: macOS-13
         strategy:
           matrix:
             arm64_ios:
@@ -399,34 +322,34 @@ stages:
           - powershell: New-Item -Type Directory -Force "$env:VCPKG_DEFAULT_BINARY_CACHE"
           - task: Cache@2
             inputs:
-              key: '"v2349-down-apple"'
+              key: '"v2351-down-apple"'
               restoreKeys: |
-                "v2349-down-apple"
+                "v2351-down-apple"
               path: $(Build.BinariesDirectory)/vcpkg/downloads
           - task: Cache@2
             inputs:
-              key: '"v2349-bin-ios" | "$(vcpkg.default.triplet)"'
+              key: '"v2351-bin-ios" | "$(vcpkg.default.triplet)"'
               restoreKeys: |
-                "v2349-bin-ios" | "$(vcpkg.default.triplet)"
+                "v2351-bin-ios" | "$(vcpkg.default.triplet)"
               path: $(vcpkg.default.binary.cache)
           - task: run-vcpkg@0
             displayName: "arm64-ios"
             inputs:
-              vcpkgArguments: "coreml-tools tensorflow-lite metal-cpp"
+              vcpkgArguments: "tensorflow-lite"
               vcpkgGitCommitId: $(vcpkg.commit)
             env:
               VCPKG_DEFAULT_TRIPLET: arm64-ios
           - task: run-vcpkg@0
             displayName: "arm64-ios-simulator"
             inputs:
-              vcpkgArguments: "coreml-tools tensorflow-lite"
+              vcpkgArguments: "tensorflow-lite"
               vcpkgGitCommitId: $(vcpkg.commit)
             env:
               VCPKG_DEFAULT_TRIPLET: arm64-ios-simulator
           - task: run-vcpkg@0
             displayName: "x64-ios-simulator"
             inputs:
-              vcpkgArguments: "xnnpack"
+              vcpkgArguments: "tensorflow-lite"
               vcpkgGitCommitId: $(vcpkg.commit)
             env:
               VCPKG_DEFAULT_TRIPLET: x64-ios-simulator
diff --git a/test/self-hosted-cuda.json b/test/self-hosted-cuda.json
index 29d175a7..33ba77d1 100644
--- a/test/self-hosted-cuda.json
+++ b/test/self-hosted-cuda.json
@@ -1,6 +1,6 @@
 {
   "name": "test",
-  "version-date": "2023-12-09",
+  "version-date": "2023-12-20",
   "description": "vcpkg registry maintained by @luncliff",
   "homepage": "https://github.com/luncliff/vcpkg-registry",
   "supports": "windows",
@@ -8,16 +8,12 @@
     {
       "name": "onnxruntime",
       "features": [
-        "cuda"
-      ],
-      "platform": "x64 & windows"
-    },
-    {
-      "name": "opencv4",
-      "features": [
-        "cudnn"
+        "cuda",
+        "directml",
+        "python",
+        "xnnpack"
       ],
       "platform": "x64 & windows"
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/test/vcpkg.json b/test/vcpkg.json
index 2e055e1c..d2a1d564 100644
--- a/test/vcpkg.json
+++ b/test/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "test",
-  "version-date": "2023-09-27",
+  "version-date": "2023-12-20",
   "description": "vcpkg registry maintained by @luncliff",
   "homepage": "https://github.com/luncliff/vcpkg-registry",
   "supports": "windows | osx | ios",
@@ -13,7 +13,16 @@
       "name": "apple-nio-ssl",
       "platform": "osx | ios"
     },
+    {
+      "name": "metal-cpp",
+      "platform": "osx | ios"
+    },
+    {
+      "name": "coreml-tools",
+      "platform": "osx | ios"
+    },
     "etcpak",
+    "libdispatch",
     {
       "name": "llama-cpp",
       "features": [
@@ -28,6 +37,18 @@
     "openssl3",
     "rvo2",
     "rvo2-3d",
+    {
+      "name": "tensorflow-lite",
+      "platform": "windows"
+    },
+    {
+      "name": "tensorflow-lite",
+      "features": [
+        "google-angle",
+        "gpu"
+      ],
+      "platform": "windows & !arm"
+    },
     {
       "name": "vcpkg-cmake",
       "host": true