diff --git a/config/ext.json b/config/ext.json
index 573d7623..b839a693 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -81,6 +81,10 @@
         "lib-depends": [
             "libmpdec"
         ]
+    "deepclone": {
+        "type": "external",
+        "source": "deepclone",
+        "arg-type": "enable"
     },
     "dio": {
         "support": {
diff --git a/config/source.json b/config/source.json
index b304b4ce..d7224d4d 100644
--- a/config/source.json
+++ b/config/source.json
@@ -94,6 +94,15 @@
             "path": "LICENSE"
         }
     },
+    "deepclone": {
+        "type": "ghtagtar",
+        "repo": "symfony/php-ext-deepclone",
+        "path": "php-src/ext/deepclone",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "dio": {
         "type": "url",
         "url": "https://pecl.php.net/get/dio",
diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 0c05297b..b69d7052 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -30,7 +30,7 @@ $test_os = [
     'ubuntu-24.04', // bin/spc for x86_64
     'ubuntu-22.04-arm', // bin/spc-gnu-docker for arm64
     'ubuntu-24.04-arm', // bin/spc for arm64
-    // 'windows-2022', // .\bin\spc.ps1
+    'windows-2022', // .\bin\spc.ps1
     'windows-2025',
 ];