diff --git a/requirements.txt b/requirements.txt
index 1804c51..e345866 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@ Flask==3.0.3
 Flask-SQLAlchemy==3.1.1
 Flask-WTF==1.2.1
 bleach[css]==6.1.0
-tinycss2==1.3.0
+tinycss2==1.2.1
 PyMySQL==1.1.1
 gunicorn==22.0.0