diff --git a/app/__init__.py b/app/__init__.py
index e69de29..0749c6d 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -0,0 +1,10 @@
+# Python version check: 3.11-3.13
+import sys
+
+
+if sys.version_info < (3, 11) or sys.version_info > (3, 13):
+    print(
+        "Warning: Unsupported Python version {ver}, please use 3.11-3.13".format(
+            ver=".".join(map(str, sys.version_info))
+        )
+    )