diff --git a/.github/pie-behaviour-tests/Dockerfile b/.github/pie-behaviour-tests/Dockerfile
index 04d47aef..274aaffd 100644
--- a/.github/pie-behaviour-tests/Dockerfile
+++ b/.github/pie-behaviour-tests/Dockerfile
@@ -29,8 +29,13 @@ RUN export DEBIAN_FRONTEND="noninteractive"; \
 ARG PHP_VERSION=8.4
 RUN mkdir -p /usr/local/src/php; \
     cd /usr/local/src/php; \
-    FULL_LATEST_VERSION=`curl -fsSL "https://www.php.net/releases/index.php?json&max=1&version=$PHP_VERSION" | jq -r '.[].source[]|select(.filename|endswith(".gz")).filename'`; \
-    wget -O php.tgz "https://www.php.net/distributions/$FULL_LATEST_VERSION" ; \
+    if [ "${PHP_VERSION%-dev}" != "$PHP_VERSION" ]; then \
+        PHP_SRC_DOWNLOAD_URL=`curl -fsSL "https://www.php.net/pre-release-builds.php?format=json" | jq -r --arg v "${PHP_VERSION%-dev}" 'to_entries[] | select(.key | startswith($v)) | .value.release.files.gz.path'` ; \
+    else \
+        FULL_LATEST_VERSION=`curl -fsSL "https://www.php.net/releases/index.php?json&max=1&version=$PHP_VERSION" | jq -r '.[].source[]|select(.filename|endswith(".gz")).filename'`; \
+        PHP_SRC_DOWNLOAD_URL="https://www.php.net/distributions/$FULL_LATEST_VERSION" ; \
+    fi; \
+    wget -O php.tgz "$PHP_SRC_DOWNLOAD_URL" ; \
     tar zxf php.tgz ; \
     rm php.tgz ; \
     ls -l ; \
@@ -44,7 +49,7 @@ RUN mkdir -p /usr/local/src/php; \
 RUN touch /usr/local/lib/php.ini
 
 COPY --from=ghcr.io/php/pie:bin /pie /usr/local/bin/pie
-RUN pie install xdebug/xdebug
+RUN BOX_REQUIREMENT_CHECKER=0 pie install xdebug/xdebug
 
 COPY --from=clone_ext_repo /example-pie-extension /example-pie-extension
 
diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index aab8204b..05597afd 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -21,6 +21,7 @@ jobs:
           - '8.3'
           - '8.4'
           - '8.5'
+          - '8.6'
     steps:
       - name: Setup PHP
         uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 #2.37.2
@@ -121,6 +122,7 @@ jobs:
           - '8.3'
           - '8.4'
           - '8.5'
+          #- '8.6' # @todo bundled repo doesn't support non-stable PHP versions
     steps:
       - name: "Purge built-in PHP version"
         run: |
@@ -160,8 +162,15 @@ jobs:
             libzip-dev
       - name: "Set php-src download URL"
         run: |
-          DIST_URL=`curl -fsSL "https://www.php.net/releases/index.php?json&max=1&version=${{ matrix.php-versions }}" | jq -r '.[].source[]|select(.filename|endswith(".gz")).filename'`
-          echo "php_src_download_url=https://www.php.net/distributions/$DIST_URL" >> $GITHUB_ENV
+          if [[ "${{ matrix.php-versions }}" == *-dev ]]; then
+            VERSION="${{ matrix.php-versions }}"
+            VERSION="${VERSION%-dev}"
+            DIST_URL=`curl -fsSL "https://www.php.net/pre-release-builds.php?format=json" | jq -r --arg v "$VERSION" 'to_entries[] | select(.key | startswith($v)) | .value.release.files.gz.path'`
+            echo "php_src_download_url=$DIST_URL" >> $GITHUB_ENV
+          else
+            DIST_URL=`curl -fsSL "https://www.php.net/releases/index.php?json&max=1&version=${{ matrix.php-versions }}" | jq -r '.[].source[]|select(.filename|endswith(".gz")).filename'`
+            echo "php_src_download_url=https://www.php.net/distributions/$DIST_URL" >> $GITHUB_ENV
+          fi
       - name: "Install PHP ${{ matrix.php-versions }}"
         env:
           php_src_download_url: ${{ env.php_src_download_url }}
@@ -220,6 +229,7 @@ jobs:
           - '8.3'
           - '8.4'
           - '8.5'
+          - '8.6-dev'
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 #v7.0.0
         with:
diff --git a/composer.json b/composer.json
index 4087aef6..15ea7389 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         }
     ],
     "require": {
-        "php": "8.1.*||8.2.*||8.3.*||8.4.*||8.5.*",
+        "php": "8.1.*||8.2.*||8.3.*||8.4.*||8.5.*||8.6.*",
         "composer/composer": "^2.10.2",
         "composer/pcre": "^3.4.0",
         "composer/semver": "^3.4.4",
@@ -49,7 +49,7 @@
         "phpstan/phpstan": "^2.2.5",
         "phpstan/phpstan-phpunit": "^2.0.18",
         "phpstan/phpstan-webmozart-assert": "^2.0",
-        "phpunit/phpunit": "^10.5.63",
+        "phpunit/phpunit": "^10.5.64",
         "thecodingmachine/phpstan-safe-rule": "^1.4.7"
     },
     "replace": {
diff --git a/composer.lock b/composer.lock
index 999aa8ba..bc7202e7 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "1f6ab4068638ae2fd252920019617e2b",
+    "content-hash": "6f326838532673606074a4937408a38b",
     "packages": [
         {
             "name": "composer/ca-bundle",
-            "version": "1.5.12",
+            "version": "1.5.13",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "00a2f4201641d5c53f7fc0195e6c8d9fcc321a78"
+                "reference": "c008272789979f709f7fcb32c2ecf1d2db5e84e5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/00a2f4201641d5c53f7fc0195e6c8d9fcc321a78",
-                "reference": "00a2f4201641d5c53f7fc0195e6c8d9fcc321a78",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/c008272789979f709f7fcb32c2ecf1d2db5e84e5",
+                "reference": "c008272789979f709f7fcb32c2ecf1d2db5e84e5",
                 "shasum": ""
             },
             "require": {
@@ -64,7 +64,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/ca-bundle/issues",
-                "source": "https://github.com/composer/ca-bundle/tree/1.5.12"
+                "source": "https://github.com/composer/ca-bundle/tree/1.5.13"
             },
             "funding": [
                 {
@@ -76,7 +76,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2026-05-19T11:26:22+00:00"
+            "time": "2026-07-18T12:35:13+00:00"
         },
         {
             "name": "composer/class-map-generator",
@@ -3407,16 +3407,16 @@
         },
         {
             "name": "phpstan/phpdoc-parser",
-            "version": "2.3.2",
+            "version": "2.3.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpdoc-parser.git",
-                "reference": "a004701b11273a26cd7955a61d67a7f1e525a45a"
+                "reference": "fb19eedd2bb67ff8cf7a5502ad329e701d6398a3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpdoc-parser/zipball/a004701b11273a26cd7955a61d67a7f1e525a45a",
-                "reference": "a004701b11273a26cd7955a61d67a7f1e525a45a",
+                "url": "https://api.github.com/repos/phpstan/phpdoc-parser/zipball/fb19eedd2bb67ff8cf7a5502ad329e701d6398a3",
+                "reference": "fb19eedd2bb67ff8cf7a5502ad329e701d6398a3",
                 "shasum": ""
             },
             "require": {
@@ -3448,9 +3448,9 @@
             "description": "PHPDoc parser with support for nullable, intersection and generic types",
             "support": {
                 "issues": "https://github.com/phpstan/phpdoc-parser/issues",
-                "source": "https://github.com/phpstan/phpdoc-parser/tree/2.3.2"
+                "source": "https://github.com/phpstan/phpdoc-parser/tree/2.3.3"
             },
-            "time": "2026-01-25T14:56:51+00:00"
+            "time": "2026-07-08T07:01:06+00:00"
         },
         {
             "name": "phpstan/phpstan",
@@ -3948,24 +3948,24 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "10.5.63",
+            "version": "10.5.64",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "33198268dad71e926626b618f3ec3966661e4d90"
+                "reference": "0e8c1d19cea35ad97d4887f363d07c78e30fbf06"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/33198268dad71e926626b618f3ec3966661e4d90",
-                "reference": "33198268dad71e926626b618f3ec3966661e4d90",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/0e8c1d19cea35ad97d4887f363d07c78e30fbf06",
+                "reference": "0e8c1d19cea35ad97d4887f363d07c78e30fbf06",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
+                "ext-filter": "*",
                 "ext-json": "*",
                 "ext-libxml": "*",
                 "ext-mbstring": "*",
-                "ext-xml": "*",
                 "ext-xmlwriter": "*",
                 "myclabs/deep-copy": "^1.13.4",
                 "phar-io/manifest": "^2.0.4",
@@ -4029,31 +4029,15 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.5.63"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.5.64"
             },
             "funding": [
                 {
-                    "url": "https://phpunit.de/sponsors.html",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/sebastianbergmann",
-                    "type": "github"
-                },
-                {
-                    "url": "https://liberapay.com/sebastianbergmann",
-                    "type": "liberapay"
-                },
-                {
-                    "url": "https://thanks.dev/u/gh/sebastianbergmann",
-                    "type": "thanks_dev"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/phpunit/phpunit",
-                    "type": "tidelift"
+                    "url": "https://phpunit.de/sponsoring.html",
+                    "type": "other"
                 }
             ],
-            "time": "2026-01-27T05:48:37+00:00"
+            "time": "2026-07-06T14:50:35+00:00"
         },
         {
             "name": "sebastian/cli-parser",
@@ -5769,7 +5753,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "8.1.*||8.2.*||8.3.*||8.4.*||8.5.*"
+        "php": "8.1.*||8.2.*||8.3.*||8.4.*||8.5.*||8.6.*"
     },
     "platform-dev": {
         "ext-openssl": "*"
diff --git a/src/Platform/TargetPlatform.php b/src/Platform/TargetPlatform.php
index 1b8d25ef..f661abac 100644
--- a/src/Platform/TargetPlatform.php
+++ b/src/Platform/TargetPlatform.php
@@ -97,6 +97,9 @@ public static function fromPhpBinaryPath(PhpBinaryPath $phpBinaryPath, int|null
                     case 'VS17':
                         $windowsCompiler = WindowsCompiler::VS17;
                         break;
+                    case 'VS18':
+                        $windowsCompiler = WindowsCompiler::VS18;
+                        break;
                 }
             }
         }
diff --git a/src/Platform/WindowsCompiler.php b/src/Platform/WindowsCompiler.php
index 7b5bc372..93466e57 100644
--- a/src/Platform/WindowsCompiler.php
+++ b/src/Platform/WindowsCompiler.php
@@ -15,4 +15,5 @@ enum WindowsCompiler
     case VC15;
     case VS16;
     case VS17;
+    case VS18;
 }
diff --git a/test/assets/pie_test_ext_win/php_pie_test_ext-1.2.3-8.6-ts-vs16-x86_64.dll b/test/assets/pie_test_ext_win/php_pie_test_ext-1.2.3-8.6-ts-vs16-x86_64.dll
new file mode 100644
index 00000000..c78b62b1
--- /dev/null
+++ b/test/assets/pie_test_ext_win/php_pie_test_ext-1.2.3-8.6-ts-vs16-x86_64.dll
@@ -0,0 +1 @@
+only a test file
diff --git a/test/assets/pie_test_ext_win/php_pie_test_ext-1.2.3-8.6-ts-vs16-x86_64.pdb b/test/assets/pie_test_ext_win/php_pie_test_ext-1.2.3-8.6-ts-vs16-x86_64.pdb
new file mode 100644
index 00000000..c78b62b1
--- /dev/null
+++ b/test/assets/pie_test_ext_win/php_pie_test_ext-1.2.3-8.6-ts-vs16-x86_64.pdb
@@ -0,0 +1 @@
+only a test file