diff --git a/cmd/cart/main.go b/cmd/cart/main.go
index 4761a35..27e01da 100644
--- a/cmd/cart/main.go
+++ b/cmd/cart/main.go
@@ -171,7 +171,11 @@ func main() {
 
 	controlPlaneConfig := actor.DefaultServerConfig()
 
-	promotionStore, err := promotions.NewStore("data/promotions.json")
+	promotionsPath := os.Getenv("PROMOTIONS_FILE")
+	if promotionsPath == "" {
+		promotionsPath = "data/promotions.json"
+	}
+	promotionStore, err := promotions.NewStore(promotionsPath)
 	if err != nil {
 		log.Fatalf("Error loading promotions: %v\n", err)
 	}