diff --git a/requirements-test.txt b/requirements-test.txt
index 9d0b3f7f..05fae07d 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,4 +1,4 @@
-iso8601==1.0.2
+iso8601==1.1.0
 requests==2.28.1
 securesystemslib==0.24.0
 six==1.16.0