diff --git a/pom.xml b/pom.xml
index c9ead2b..adf2239 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
     <yorc.google.types.version>1.0.0</yorc.google.types.version>
     <yorc.hp.types.version>1.1.0</yorc.hp.types.version>
     <yorc.k8s.types.version>3.1.0</yorc.k8s.types.version>
-    <yorc.os.types.version>3.0.0</yorc.os.types.version>
+    <yorc.os.types.version>3.1.0</yorc.os.types.version>
     <yorc.slurm.types.version>3.0.0</yorc.slurm.types.version>
 
     <!-- Tests -->
diff --git a/src/main/resources/openstack/resources/resources.yaml b/src/main/resources/openstack/resources/resources.yaml
index e9721cc..8738cbc 100644
--- a/src/main/resources/openstack/resources/resources.yaml
+++ b/src/main/resources/openstack/resources/resources.yaml
@@ -166,6 +166,10 @@ node_types:
         entry_schema:
           type: string
         required: false
+      user_data:
+        type: string
+        description: User data to provide when launching the instance
+        required: false
     requirements:
       - group:
           capability: yorc.capabilities.Group