1 files changed, 1 insertions, 1 deletions

diff --git a/elements.json b/elements.json
index 14c083f..53b5944 100644
--- a/elements.json
+++ b/elements.json
@@ -1209,7 +1209,7 @@
     "number": 109,
     "symbol": "Mt",
     "name": "Meitnerium",
-    "category": "unknown",
+    "category": "transition-metal",
     "column": 9,
     "row": 7,
     "quantum": "Used in quantum materials research",