diff --git a/requirements.txt b/requirements.txt
index 25ad93b..e4057d6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 Flask>=3.1.3,<4
 gunicorn>=26.0
-castle>=7.1.0,<8
+castle>=7.3.0,<8
 python-dotenv>=1.2