diff --git a/workflow-parser/src/workflow-v1.0.json b/workflow-parser/src/workflow-v1.0.json
index 4587263..f990beb 100644
--- a/workflow-parser/src/workflow-v1.0.json
+++ b/workflow-parser/src/workflow-v1.0.json
@@ -577,7 +577,8 @@
       "mapping": {
         "properties": {
           "types": "merge-group-activity",
-          "branches": "event-branches"
+          "branches": "event-branches",
+          "branches-ignore": "event-branches-ignore"
         }
       }
     },
diff --git a/workflow-parser/testdata/reader/events-mapping-all.yml b/workflow-parser/testdata/reader/events-mapping-all.yml
index 900a1f9..94b26ef 100644
--- a/workflow-parser/testdata/reader/events-mapping-all.yml
+++ b/workflow-parser/testdata/reader/events-mapping-all.yml
@@ -73,8 +73,10 @@ on:
       - deleted
   merge_group:
     branches: 
-        - master 
-        - main
+      - master 
+      - main
+    branches-ignore:
+      - develop
     types: 
       - checks_requested
   milestone:
@@ -321,6 +323,9 @@ jobs:
         "master",
         "main"
       ],
+      "branches-ignore": [
+        "develop"
+      ],
       "types": [
         "checks_requested"
       ]