diff --git a/package.json b/package.json
index 6deb62f..299f4e7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@flexbase/openapi-generator",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "description": "Open API code generator",
   "author": {
     "name": "Flexbase Technologies",
diff --git a/templates/server/validation.expression.hbs b/templates/server/validation.expression.hbs
index eb710bb..e761908 100644
--- a/templates/server/validation.expression.hbs
+++ b/templates/server/validation.expression.hbs
@@ -17,7 +17,7 @@
             }
         {{else compare format "===" "duration"}}
             if(Number.isNaN(Number({{safeName}}))) {
-                const {{safeName}}dtTest = Duration.fromISO({{safeName}}, {zone: 'utc'});
+                const {{safeName}}dtTest = Duration.fromISO({{safeName}});
                 if(!{{safeName}}dtTest.isValid) {
                     utilities.addOrSet({{errorsName}}, '{{name}}', `is not valid: ${ {{safeName}}dtTest.invalidExplanation }`);
                 }