diff --git a/deny.toml b/deny.toml
index ccd2a4456..9aefe3fe4 100644
--- a/deny.toml
+++ b/deny.toml
@@ -84,6 +84,7 @@ allow = [
     "MPL-2.0",
     "ISC",
     "OpenSSL",
+    "CC0-1.0",
 ]
 # List of explicitly disallowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses