diff --git a/lib/cot.ts b/lib/cot.ts
index 763a2bd..ba00793 100644
--- a/lib/cot.ts
+++ b/lib/cot.ts
@@ -175,7 +175,7 @@ export default class CoT {
                     });
                 }
             } else if (feature.geometry.type === 'Polygon') {
-                cot.event._attributes.type = 'u-d-r';
+                cot.event._attributes.type = 'u-d-f';
 
                 // Inner rings are not yet supported
                 cot.event.detail.link = [];
diff --git a/package-lock.json b/package-lock.json
index 9a396cd..c3c481c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
                 "@turf/point-on-feature": "^6.5.0",
                 "@types/color": "^3.0.3",
                 "@types/geojson": "^7946.0.10",
-                "ajv": "^8.11.2",
+                "ajv": "^8.12.0",
                 "color": "^4.2.3",
                 "protobufjs": "^7.1.2",
                 "xml-js": "^1.6.11"
diff --git a/package.json b/package.json
index 784bb0c..5ff7349 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
         "@turf/point-on-feature": "^6.5.0",
         "@types/color": "^3.0.3",
         "@types/geojson": "^7946.0.10",
-        "ajv": "^8.11.2",
+        "ajv": "^8.12.0",
         "color": "^4.2.3",
         "protobufjs": "^7.1.2",
         "xml-js": "^1.6.11"