diff --git a/zenstruck/foundry/2.5/manifest.json b/zenstruck/foundry/2.5/manifest.json
index 2306a8017..979f89173 100644
--- a/zenstruck/foundry/2.5/manifest.json
+++ b/zenstruck/foundry/2.5/manifest.json
@@ -7,7 +7,18 @@
     },
     "conflict": {
         "doctrine/persistence": "<2.0",
+        "symfony/flex": "<1.23.0 || >=2.0.0,<2.8.0",
         "symfony/framework-bundle": "<6.4"
     },
-    "aliases": ["foundry"]
+    "aliases": ["foundry"],
+    "add-lines": [
+        {
+            "file": "phpunit.dist.xml",
+            "content": "        <bootstrap class=\"Zenstruck\\Foundry\\PHPUnit\\FoundryExtension\" />",
+            "position": "after_target",
+            "target": "<extensions>",
+            "requires": "phpunit/phpunit:>=10",
+            "warn_if_missing": false
+        }
+    ]
 }
diff --git a/zenstruck/foundry/2.6/manifest.json b/zenstruck/foundry/2.6/manifest.json
index 74017adb5..44f5d325f 100644
--- a/zenstruck/foundry/2.6/manifest.json
+++ b/zenstruck/foundry/2.6/manifest.json
@@ -8,7 +8,18 @@
     },
     "conflict": {
         "doctrine/persistence": "<2.0",
+        "symfony/flex": "<1.23.0 || >=2.0.0,<2.8.0",
         "symfony/framework-bundle": "<6.4"
     },
-    "aliases": ["foundry"]
+    "aliases": ["foundry"],
+    "add-lines": [
+        {
+            "file": "phpunit.dist.xml",
+            "content": "        <bootstrap class=\"Zenstruck\\Foundry\\PHPUnit\\FoundryExtension\" />",
+            "position": "after_target",
+            "target": "<extensions>",
+            "requires": "phpunit/phpunit:>=10",
+            "warn_if_missing": false
+        }
+    ]
 }