diff --git a/relationships/definition.json b/relationships/definition.json
index e67c836..0010098 100644
--- a/relationships/definition.json
+++ b/relationships/definition.json
@@ -1,5 +1,5 @@
 {
-  "version": 12,
+  "version": 13,
   "values": [
     {
       "name": "derived-from",
@@ -615,6 +615,13 @@
       "format": [
         "misp"
       ]
+    },
+    {
+      "name": "signed-by",
+      "description": "This relationship describes an object signed by another object.",
+      "format": [
+        "misp"
+      ]
     }
   ],
   "description": "Default type of relationships in MISP objects.",