diff --git a/hyper-schema.json b/hyper-schema.json
index ec9c1441..4e557f92 100644
--- a/hyper-schema.json
+++ b/hyper-schema.json
@@ -54,6 +54,12 @@
             "type": "array",
             "items": {"$ref": "#/definitions/linkDescription"}
         },
+        "deprecated": {
+            "type": "boolean"
+        },
+        "readOnly": {
+            "type": "boolean"
+        },
         "media": {
             "type": "object",
             "properties": {
diff --git a/jsonschema-hyperschema.xml b/jsonschema-hyperschema.xml
index e5280850..033c99bf 100644
--- a/jsonschema-hyperschema.xml
+++ b/jsonschema-hyperschema.xml
@@ -334,6 +334,16 @@
                 </section>
             </section>
 
+            <section title="deprecated">
+                <t>
+                    If it has a value of boolean true, this keyword indicates that the value of the instance is deprecated, and intended for reverse compatability or internal use only, and may become missing in the future.
+                </t>
+                <t>
+                    The value of this keyword MUST be a boolean.
+                    The default value is false.
+                </t>
+            </section>
+
             <section title="readOnly">
                 <t>
                     If it has a value of boolean true, this keyword indicates that the value of the instance is managed exclusively by the server or the owning authority, and attempts by a user agent to modify the value of this property are expected to be ignored or rejected by a server.