diff --git a/package.json b/package.json
index 792a54a..c48ed5b 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
   "license": "MIT",
   "packageManager": "pnpm@11.6.0",
   "dependencies": {
-    "document-schema.js": "^3.3.0",
+    "document-schema.js": "^4.0.0",
     "fast-xml-parser": "^5.10.1",
     "fflate": "^0.8.3",
     "zod": "^4.4.3"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index cd9665f..b0c029d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -12,8 +12,8 @@ importers:
   .:
     dependencies:
       document-schema.js:
-        specifier: ^3.3.0
-        version: 3.3.0
+        specifier: ^4.0.0
+        version: 4.0.0
       fast-xml-parser:
         specifier: ^5.10.1
         version: 5.10.1
@@ -1608,8 +1608,8 @@ packages:
     resolution: {integrity: sha512-WkrWp9GR4KXfKGYzOLmTuGVi1UWFfws377n9cc55/tb6DuqyF6pcQ5AbiHEshaDpY9v6oaSr2XCDidGmMwdzIA==}
     engines: {node: '>=8'}
 
-  document-schema.js@3.3.0:
-    resolution: {integrity: sha512-Jcg+sLEKF6T2w6WdCD1S0DcKFt1Kpk/rO1AZlE7fi0pqN4Ys8tN3qeY97DPc78QRy+EkbCW5hKLwM0EyV+Ojqw==}
+  document-schema.js@4.0.0:
+    resolution: {integrity: sha512-aCBeWHDubmchJBXPx7ZesLmGgOCAPOEI3n/PzunPLBEUq/w+hGpl/XLczGyyPkURu7nKR+dP6M1p7u6k4YxDsw==}
     engines: {node: '>=20'}
 
   dot-prop@5.3.0:
@@ -4540,7 +4540,7 @@ snapshots:
     dependencies:
       path-type: 4.0.0
 
-  document-schema.js@3.3.0:
+  document-schema.js@4.0.0:
     dependencies:
       zod: 4.4.3