diff --git a/deny.toml b/deny.toml
index 62a37bd0..cf4d54fd 100644
--- a/deny.toml
+++ b/deny.toml
@@ -7,4 +7,4 @@ allow-git = [
 ]
 
 [licenses]
-allow = [ "Apache-2.0", "MIT", "Unicode-DFS-2016" ]
+allow = [ "Apache-2.0", "MIT", "Unicode-DFS-2016", "ISC" ]