diff --git a/launch.py b/launch.py
index 4608bc817..801e0371d 100644
--- a/launch.py
+++ b/launch.py
@@ -26,7 +26,7 @@ def check_python_version():
         version_range = range(7, 12)
 
     try:
-        assert version.major == 3 and version.minor in version_range, "Unsupported Python version, please use Python 3.10.x instead. You can download latest release as of 25th January (3.10.9) from here: https://www.python.org/downloads/release/python-3109/. Please, make sure to first delete current version of Python first."
+        assert version.major == 3 and version.minor in version_range, "Unsupported Python version, please use Python 3.10.x instead. You can download latest release as of 25th January (3.10.9) from here: https://www.python.org/downloads/release/python-3109/. Please, make sure to first delete current version of Python first and delete `venv` folder inside of WebUI's folder, too."
     except AssertionError as e:
         print(e)
         sys.exit(-1)