diff --git a/requirements.txt b/requirements.txt
index c7a86745..be4be71b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ requests>=2.28.2
 chardet>=5.1.0
 Pillow
 web.py
+legacy-cgi; python_version >= "3.13"
 python-dotenv>=1.0.0
 PyYAML>=6.0
 croniter>=2.0.0