diff --git a/requirements/licenses.ini b/requirements/licenses.ini
index 17e3361e9..64ec78090 100644
--- a/requirements/licenses.ini
+++ b/requirements/licenses.ini
@@ -9,6 +9,7 @@ authorized_licenses:
     mozilla public license 2.0 (mpl 2.0)
     PSF
     Python Software Foundation
+    ISC License (ISCL)
 
 unauthorized_licenses: