diff --git a/.wwhrd.yml b/.wwhrd.yml
index 41f0154c6..ef11e4e43 100644
--- a/.wwhrd.yml
+++ b/.wwhrd.yml
@@ -3,3 +3,4 @@ allowlist:
   - MIT
   - BSD-3-Clause
   - BSD-2-Clause
+  - ISC