diff --git a/package.json b/package.json
index 5a5d24de..8e5f0e7c 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,7 @@
   "packageManager": "pnpm@11.6.0",
   "dependencies": {
     "byte-codec": "^1.1.9",
-    "document-schema.js": "^2.7.17",
+    "document-schema.js": "^3.1.0",
     "fflate": "^0.8.3",
     "markdown-codec": "^1.4.2",
     "odf.js": "^2.7.23",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3e97ea11..808b00b8 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -16,8 +16,8 @@ importers:
         specifier: ^1.1.9
         version: 1.1.9
       document-schema.js:
-        specifier: ^2.7.17
-        version: 2.7.17
+        specifier: ^3.1.0
+        version: 3.1.0
       fflate:
         specifier: ^0.8.3
         version: 0.8.3
@@ -1633,6 +1633,10 @@ packages:
     resolution: {integrity: sha512-XDu/+fo56WrXrcR3f16xH5lYEQX+3b4W6kJELRNFwrrWxOqhQBQepXMkCi+niSrgCEIcfaC1IeaGPlZ8oj5gSw==}
     engines: {node: '>=20'}
 
+  document-schema.js@3.1.0:
+    resolution: {integrity: sha512-Qj+0yx3lkorssXCAOIhLtrPKdJEMaB3E1QyloXWJt2H3NM8+ed7w6TyjWHeiaCnl57eGoAuUDWFGgwYDm/CGqA==}
+    engines: {node: '>=20'}
+
   dot-prop@5.3.0:
     resolution: {integrity: sha512-QM8q3zDe58hqUqjraQOmzZ1LIH9SWQJTlEKCH4kJ2oQvLZk7RbQXvtDM2XEq3fwkV9CCvvH4LA0AV+ogFsBM2Q==}
     engines: {node: '>=8'}
@@ -4589,6 +4593,10 @@ snapshots:
     dependencies:
       zod: 4.4.3
 
+  document-schema.js@3.1.0:
+    dependencies:
+      zod: 4.4.3
+
   dot-prop@5.3.0:
     dependencies:
       is-obj: 2.0.0