diff --git a/requirements.txt b/requirements.txt
index 04e43f1..9ba1ea2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 tornado==6.0.4
-isodate==0.6.0
+isodate==0.6.1
 pytest==5.4.1
 schwifty==2020.11.0
 Cerberus==1.3.2