diff --git a/gtfs-validator-webapp/component.json b/gtfs-validator-webapp/component.json
index d9cb46b..4b46780 100644
--- a/gtfs-validator-webapp/component.json
+++ b/gtfs-validator-webapp/component.json
@@ -1,7 +1,7 @@
 {
     "name": "validation_output",
     "dependencies": {
-	"jashkenas/backbone": "*",
+	"jashkenas/backbone": "1.2.3",
 	"jashkenas/underscore": "*",
 	"components/bootstrap": "*",
 	"components/jquery": "*"