diff --git a/requirements_all.txt b/requirements_all.txt
index 1dcd608..0444e19 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1,5 +1,5 @@
 alembic==1.4.3
-aniso8601==7.0.0
+aniso8601==8.0.0
 apache-airflow==1.10.12
 apispec==1.3.3
 appdirs==1.4.4