diff --git a/internal/makefile/license-scan-rules.json b/internal/makefile/license-scan-rules.json
index e584e9d..aac9864 100644
--- a/internal/makefile/license-scan-rules.json
+++ b/internal/makefile/license-scan-rules.json
@@ -6,6 +6,7 @@
     "ISC",
     "MIT",
     "MPL-2.0",
-    "Unlicense"
+    "Unlicense",
+    "Zlib"
   ]
 }