diff --git a/modules/one_click_installer_check.py b/modules/one_click_installer_check.py
new file mode 100644
index 00000000..29c0c546
--- /dev/null
+++ b/modules/one_click_installer_check.py
@@ -0,0 +1,8 @@
+from pathlib import Path
+from modules.logging_colors import logger
+
+if Path('../webui.py').exists():
+    logger.warning('\nIt looks like you are running an outdated version of '
+                   'the one-click-installers.\n'
+                   'Please migrate your installation following the instructions here:\n'
+                   'https://')
diff --git a/server.py b/server.py
index fc99ef72..6f7b03ec 100644
--- a/server.py
+++ b/server.py
@@ -1,6 +1,7 @@
 import os
 import warnings
 
+import modules.one_click_installer_check
 from modules.block_requests import OpenMonkeyPatch, RequestBlocker
 from modules.logging_colors import logger