diff --git a/requirements-test.txt b/requirements-test.txt
index 53511ff1..60d69606 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,4 +1,4 @@
-iso8601==2.0.0
+iso8601==2.1.0
 requests==2.31.0
 securesystemslib==0.28.0
 six==1.16.0