diff --git a/file-type/machinetag.json b/file-type/machinetag.json
index 242fe58..35d44d0 100755
--- a/file-type/machinetag.json
+++ b/file-type/machinetag.json
@@ -412,6 +412,11 @@
           "expanded": "document",
           "value": "xlsx"
         },
+        {
+          "colour": "#00663f",
+          "expanded": "document",
+          "value": "xlsm"
+        },
         {
           "colour": "#99ffd8",
           "expanded": "document",