diff --git a/openapi-spec.yml b/openapi-spec.yml
index e9facf8..46b19f6 100644
--- a/openapi-spec.yml
+++ b/openapi-spec.yml
@@ -1,6 +1,6 @@
 openapi: "3.0.0"
 info:
-  version: 0.4.0
+  version: 0.4.2
   title: xOpera API
   license:
     name: Apache-2.0
diff --git a/src/opera/api/controllers/default.py b/src/opera/api/controllers/default.py
index 5eb867d..b880acb 100644
--- a/src/opera/api/controllers/default.py
+++ b/src/opera/api/controllers/default.py
@@ -83,7 +83,7 @@ def validate(body: DeploymentInput = None):
 
     result = ValidationResult()
     try:
-        opera_validate(deployment_input.service_template, deployment_input.inputs)
+        opera_validate(PurePath(deployment_input.service_template), deployment_input.inputs)
         result.success = True
     except Exception as e:
         result.success = False