diff --git a/poison-taxonomy/machinetag.json b/poison-taxonomy/machinetag.json
index d13a4f1..8297a35 100644
--- a/poison-taxonomy/machinetag.json
+++ b/poison-taxonomy/machinetag.json
@@ -1,5 +1,5 @@
 {
-  "namespace": "poison Taxonomy",
+  "namespace": "poison-taxonomy",
   "description": "Non-exhaustive taxonomy of natural poison",
   "version": 1,
   "predicates": [