diff --git a/requirements.txt b/requirements.txt
index aa9fcaf..4d0a21f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # Package
 aiohttp==3.12.15
-ciso8601==2.3.2
+ciso8601==2.3.3
 httpx==0.28.1
 zeep[async]==4.3.1
 yarl==1.20.1