diff --git a/srv/isc-agent/requirements.txt b/srv/isc-agent/requirements.txt
index 6393f33..32077af 100644
--- a/srv/isc-agent/requirements.txt
+++ b/srv/isc-agent/requirements.txt
@@ -18,7 +18,7 @@ hpack==4.0.0 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
 hyperframe==6.0.1 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
 hyperlink==21.0.0 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
 hypothesis==6.79.4 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
-idna==3.5 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
+idna==3.6 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
 importlib-metadata==6.7.0 ; python_full_version >= "3.7.1" and python_version < "3.8"
 incremental==22.10.0 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"
 jinja2==3.0.3 ; python_full_version >= "3.7.1" and python_full_version < "4.0.0"