diff --git a/jsonschema-validation.xml b/jsonschema-validation.xml
index 1c3aa1c0..1ea5f54a 100644
--- a/jsonschema-validation.xml
+++ b/jsonschema-validation.xml
@@ -548,6 +548,17 @@
                 </t>
             </section>
 
+            <section title="propertyNames">
+                <t>
+                    The value of "propertyNames" MUST be a valid JSON Schema.
+                </t>
+                <t>
+                    If the instance is an object, this keyword validates if every property name in the instance
+                    validates against the provided schema.
+                    Note the property name that the schema is testing will always be a string.
+                </t>
+            </section>
+
             <section title="enum">
                 <t>
                     The value of this keyword MUST be an array. This array SHOULD have at
diff --git a/schema.json b/schema.json
index d44cd480..ec766157 100644
--- a/schema.json
+++ b/schema.json
@@ -124,6 +124,7 @@
                 ]
             }
         },
+        "propertyNames": { "$ref": "#" },
         "const": {},
         "enum": {
             "type": "array",