diff --git a/deny.toml b/deny.toml
index 48a55550..8b03f5b4 100644
--- a/deny.toml
+++ b/deny.toml
@@ -32,6 +32,7 @@ allow = [
     # Used by webpki-roots and option-ext which we are using without modifications in a larger work, therefore okay.
     "MPL-2.0",
     "BSD-3-Clause",
+    "BSD-2-Clause",
     "OpenSSL",
     "Zlib",
 ]