diff --git a/relationships/definition.json b/relationships/definition.json
index 53a4dcd..fae3795 100644
--- a/relationships/definition.json
+++ b/relationships/definition.json
@@ -1,5 +1,5 @@
 {
-  "version": 16,
+  "version": 17,
   "values": [
     {
       "name": "derived-from",
@@ -204,6 +204,13 @@
         "stix-2.0"
       ]
     },
+    {
+      "name": "mentions",
+      "description": "This relationship describes that the source object mentions the target object.",
+      "format": [
+        "misp"
+      ]
+    },
     {
       "name": "mitigates",
       "description": "This relationship describes a source object which mitigates the target object.",