diff --git a/deny.toml b/deny.toml
index d40c1a0..88413dc 100644
--- a/deny.toml
+++ b/deny.toml
@@ -75,6 +75,7 @@ allow = [
     "BSD-3-Clause",
     "Unicode-DFS-2016",
     "0BSD",
+    "ISC",
 ]
 # List of explictly disallowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses