diff --git a/deny.toml b/deny.toml
index fda1256..5643982 100644
--- a/deny.toml
+++ b/deny.toml
@@ -112,6 +112,7 @@ allow = [
     "Apache-2.0",
     "Unicode-DFS-2016",
     "BSD-2-Clause",
+    "Zlib",
     #"Apache-2.0 WITH LLVM-exception",
 ]
 # List of explicitly disallowed licenses