diff --git a/utils/opencas.py b/utils/opencas.py
index 600cd9a..c96460a 100644
--- a/utils/opencas.py
+++ b/utils/opencas.py
@@ -152,6 +152,12 @@ class casadm:
                     '--file', ioclass_file]
         return cls.run_cmd(cmd)
 
+    @classmethod
+    def start_upgrade(cls):
+        cmd = [cls.casadm_path, '--script', '--upgrade-in-flight']
+
+        return cls.run_cmd(cmd)
+
 # Configuration file parser