diff --git a/.github/workflows/win.yml b/.github/workflows/win.yml
index efd4eaacf455..7e889f788c0f 100644
--- a/.github/workflows/win.yml
+++ b/.github/workflows/win.yml
@@ -35,7 +35,6 @@ jobs:
         uses: actions/cache@v5
         with:
           path: | # openssl and llvm take much longer to build so they are cached separately
-            libs/pcre.lib
             libs/pcre2-8.lib
             libs/iconv.lib
             libs/gc.lib
@@ -55,16 +54,13 @@ jobs:
           add-to-path: false
       - name: Build libgc
         if: steps.cache-libs.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-gc.ps1 -BuildTree deps\gc -Version 8.2.8 -AtomicOpsVersion 7.8.2
-      - name: Build libpcre
-        if: steps.cache-libs.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-pcre.ps1 -BuildTree deps\pcre -Version 8.45
+        run: .\etc\win-ci\build-gc.ps1 -BuildTree deps\gc -Version 8.2.12 -AtomicOpsVersion 7.10.0
       - name: Build libpcre2
         if: steps.cache-libs.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-pcre2.ps1 -BuildTree deps\pcre2 -Version 10.45
+        run: .\etc\win-ci\build-pcre2.ps1 -BuildTree deps\pcre2 -Version 10.47
       - name: Build libiconv
         if: steps.cache-libs.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-iconv.ps1 -BuildTree deps\iconv -Version 1.18
+        run: .\etc\win-ci\build-iconv.ps1 -BuildTree deps\iconv -Version 1.19
       - name: Build libffi
         if: steps.cache-libs.outputs.cache-hit != 'true'
         run: .\etc\win-ci\build-ffi.ps1 -BuildTree deps\ffi -Version 3.5.1
@@ -79,7 +75,7 @@ jobs:
         run: .\etc\win-ci\build-yaml.ps1 -BuildTree deps\yaml -Version 0.2.5
       - name: Build libxml2
         if: steps.cache-libs.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-xml2.ps1 -BuildTree deps\xml2 -Version 2.13.8
+        run: .\etc\win-ci\build-xml2.ps1 -BuildTree deps\xml2 -Version 2.15.3
 
       - name: Cache OpenSSL
         id: cache-openssl
@@ -117,7 +113,6 @@ jobs:
         uses: actions/cache@v5
         with:
           path: | # openssl and llvm take much longer to build so they are cached separately
-            libs/pcre-dynamic.lib
             libs/pcre2-8-dynamic.lib
             libs/iconv-dynamic.lib
             libs/gc-dynamic.lib
@@ -126,7 +121,6 @@ jobs:
             libs/mpir-dynamic.lib
             libs/yaml-dynamic.lib
             libs/xml2-dynamic.lib
-            dlls/pcre.dll
             dlls/pcre2-8.dll
             dlls/iconv-2.dll
             dlls/gc.dll
@@ -145,16 +139,13 @@ jobs:
           add-to-path: false
       - name: Build libgc
         if: steps.cache-dlls.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-gc.ps1 -BuildTree deps\gc -Version 8.2.8 -AtomicOpsVersion 7.8.2 -Dynamic
-      - name: Build libpcre
-        if: steps.cache-dlls.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-pcre.ps1 -BuildTree deps\pcre -Version 8.45 -Dynamic
+        run: .\etc\win-ci\build-gc.ps1 -BuildTree deps\gc -Version 8.2.12 -AtomicOpsVersion 7.10.0 -Dynamic
       - name: Build libpcre2
         if: steps.cache-dlls.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-pcre2.ps1 -BuildTree deps\pcre2 -Version 10.45 -Dynamic
+        run: .\etc\win-ci\build-pcre2.ps1 -BuildTree deps\pcre2 -Version 10.47 -Dynamic
       - name: Build libiconv
         if: steps.cache-dlls.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-iconv.ps1 -BuildTree deps\iconv -Version 1.18 -Dynamic
+        run: .\etc\win-ci\build-iconv.ps1 -BuildTree deps\iconv -Version 1.19 -Dynamic
       - name: Build libffi
         if: steps.cache-dlls.outputs.cache-hit != 'true'
         run: .\etc\win-ci\build-ffi.ps1 -BuildTree deps\ffi -Version 3.4.7 -Dynamic
@@ -169,7 +160,7 @@ jobs:
         run: .\etc\win-ci\build-yaml.ps1 -BuildTree deps\yaml -Version 0.2.5 -Dynamic
       - name: Build libxml2
         if: steps.cache-dlls.outputs.cache-hit != 'true'
-        run: .\etc\win-ci\build-xml2.ps1 -BuildTree deps\xml2 -Version 2.13.6 -Dynamic
+        run: .\etc\win-ci\build-xml2.ps1 -BuildTree deps\xml2 -Version 2.15.3 -Dynamic
 
       - name: Cache OpenSSL
         id: cache-openssl-dlls
diff --git a/.github/workflows/win_build_portable.yml b/.github/workflows/win_build_portable.yml
index 1660e9eaccbd..b02b0e4b3d04 100644
--- a/.github/workflows/win_build_portable.yml
+++ b/.github/workflows/win_build_portable.yml
@@ -44,7 +44,6 @@ jobs:
         uses: actions/cache/restore@v5
         with:
           path: |
-            libs/pcre.lib
             libs/pcre2-8.lib
             libs/iconv.lib
             libs/gc.lib
@@ -69,7 +68,6 @@ jobs:
         uses: actions/cache/restore@v5
         with:
           path: |
-            libs/pcre-dynamic.lib
             libs/pcre2-8-dynamic.lib
             libs/iconv-dynamic.lib
             libs/gc-dynamic.lib
@@ -78,7 +76,6 @@ jobs:
             libs/mpir-dynamic.lib
             libs/yaml-dynamic.lib
             libs/xml2-dynamic.lib
-            dlls/pcre.dll
             dlls/pcre2-8.dll
             dlls/iconv-2.dll
             dlls/gc.dll
diff --git a/etc/win-ci/build-mpir.ps1 b/etc/win-ci/build-mpir.ps1
index 24111e762b7b..aeead00d054e 100644
--- a/etc/win-ci/build-mpir.ps1
+++ b/etc/win-ci/build-mpir.ps1
@@ -6,7 +6,7 @@ param(
 . "$(Split-Path -Parent $MyInvocation.MyCommand.Path)\setup.ps1"
 
 [void](New-Item -Name (Split-Path -Parent $BuildTree) -ItemType Directory -Force)
-Setup-Git -Path $BuildTree -Url https://github.com/BrianGladman/mpir.git -Ref dc82b0475dea84d5338356e49176c40be03a5bdf # master@{2023-02-10}
+Setup-Git -Path $BuildTree -Url https://github.com/BrianGladman/mpir.git -Ref f84ce09218b91d4c4fdf26e75093918c9fdb7046 # master@{2026-02-25}
 
 Run-InDirectory $BuildTree {
     $vsVersion = "vs$((& "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" -property displayName) -replace '.*\b\d\d(\d\d)\b.*', '$1')"
diff --git a/etc/win-ci/build-pcre.ps1 b/etc/win-ci/build-pcre.ps1
deleted file mode 100644
index ea021e309de2..000000000000
--- a/etc/win-ci/build-pcre.ps1
+++ /dev/null
@@ -1,49 +0,0 @@
-param(
-    [Parameter(Mandatory)] [string] $BuildTree,
-    [Parameter(Mandatory)] [string] $Version,
-    [switch] $Dynamic
-)
-
-function Find-7Zip {
-    $Path = Get-Command "7z" -CommandType Application -TotalCount 1 -ErrorAction SilentlyContinue
-    if ($Path) { return $Path.Path }
-
-    $Path = "$env:ProgramFiles\7-Zip\7z.exe"
-    if (Test-Path -Path $Path -PathType Leaf) { return $Path }
-
-    $Path = "${env:ProgramFiles(x86)}\7-Zip\7z.exe"
-    if (Test-Path -Path $Path -PathType Leaf) { return $Path }
-
-    Write-Host "Error: Cannot locate 7-Zip executable" -ForegroundColor Red
-    Exit 1
-}
-
-. "$(Split-Path -Parent $MyInvocation.MyCommand.Path)\setup.ps1"
-
-[void](New-Item -Name (Split-Path -Parent $BuildTree) -ItemType Directory -Force)
-Invoke-WebRequest https://cs.stanford.edu/pub/exim/pcre/pcre-$Version.zip -OutFile pcre.zip
-& (Find-7Zip) x pcre.zip
-mv pcre-* $BuildTree
-rm pcre.zip
-
-Run-InDirectory $BuildTree {
-    $args = "-DPCRE_BUILD_PCREGREP=OFF -DPCRE_BUILD_TESTS=OFF -DPCRE_BUILD_PCRECPP=OFF -DPCRE_SUPPORT_JIT=ON -DPCRE_SUPPORT_UNICODE_PROPERTIES=ON -DCMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH=OFF"
-    if ($Dynamic) {
-        $args = "-DBUILD_SHARED_LIBS=ON $args"
-    } else {
-        $args = "-DBUILD_SHARED_LIBS=OFF -DPCRE_STATIC_RUNTIME=ON $args"
-    }
-    & $cmake . $args.split(' ')
-    & $cmake --build . --config Release
-    if (-not $?) {
-        Write-Host "Error: Failed to build PCRE" -ForegroundColor Red
-        Exit 1
-    }
-}
-
-if ($Dynamic) {
-    mv -Force $BuildTree\Release\pcre.lib libs\pcre-dynamic.lib
-    mv -Force $BuildTree\Release\pcre.dll dlls\
-} else {
-    mv -Force $BuildTree\Release\pcre.lib libs\
-}
diff --git a/etc/win-ci/build-yaml.ps1 b/etc/win-ci/build-yaml.ps1
index 5f0972003f71..2341d74c5ede 100644
--- a/etc/win-ci/build-yaml.ps1
+++ b/etc/win-ci/build-yaml.ps1
@@ -10,7 +10,7 @@ param(
 Setup-Git -Path $BuildTree -Url https://github.com/yaml/libyaml.git -Ref $Version
 
 Run-InDirectory $BuildTree {
-    $args = "-DBUILD_TESTING=OFF -DCMAKE_POLICY_DEFAULT_CMP0091=NEW -DCMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH=OFF"
+    $args = "-DBUILD_TESTING=OFF -DCMAKE_POLICY_DEFAULT_CMP0091=NEW -DCMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH=OFF -DCMAKE_POLICY_VERSION_MINIMUM=3.10"
     if ($Dynamic) {
         $args = "-DBUILD_SHARED_LIBS=ON $args"
     } else {