diff --git a/dao/persondao.js b/dao/persondao.js
index 987542b21d3ceef0e2423ce506a08a2323fbcea9..484476504e30d70740cbacd15a3bf97796e80b2c 100644
--- a/dao/persondao.js
+++ b/dao/persondao.js
@@ -21,4 +21,13 @@ module.exports = class PersonDao extends Dao {
       callback
     );
   }
+
+  updateOne(json, callback) {
+    var val = [json.navn, json.adresse, json.alder, json.id];
+    super.query(
+        "update person set navn=?, adresse=?, alder=?, where id=?",
+        val,
+        callback
+    );
+  }
 };