diff --git a/licence_checker.yml b/licence_checker.yml
index 5dc89abf..c482b341 100644
--- a/licence_checker.yml
+++ b/licence_checker.yml
@@ -31,6 +31,7 @@ allowed-licenses:
   - BSD-3-Clause-LBNL
   - BSD-3-Clause
   - BSL-1.0
+  - CC0-1.0
   - EPICS
   - HPND
   - ICU