diff --git a/pkg/parser/schema_location_test.go b/pkg/parser/schema_location_test.go
index 38af5c5c851..6399e641968 100644
--- a/pkg/parser/schema_location_test.go
+++ b/pkg/parser/schema_location_test.go
@@ -166,6 +166,19 @@ func TestValidateMainWorkflowFrontmatterWithSchemaAndLocation(t *testing.T) {
 			filePath: "/test/workflow.md",
 			wantErr:  false,
 		},
+		{
+			name: "valid pull_request_target ready_for_review trigger",
+			frontmatter: map[string]any{
+				"on": map[string]any{
+					"pull_request_target": map[string]any{
+						"types": []any{"ready_for_review"},
+					},
+				},
+				"engine": "claude",
+			},
+			filePath: "/test/workflow.md",
+			wantErr:  false,
+		},
 		{
 			name: "invalid workflow frontmatter with location",
 			frontmatter: map[string]any{
diff --git a/pkg/parser/schemas/main_workflow_schema.json b/pkg/parser/schemas/main_workflow_schema.json
index 30423670e3d..3c1211b2923 100644
--- a/pkg/parser/schemas/main_workflow_schema.json
+++ b/pkg/parser/schemas/main_workflow_schema.json
@@ -1410,6 +1410,7 @@
                       "reopened",
                       "synchronize",
                       "converted_to_draft",
+                      "ready_for_review",
                       "locked",
                       "unlocked",
                       "enqueued",