diff --git a/cmd/catalog-api/main.go b/cmd/catalog-api/main.go
index f9f457e..5bdcc3a 100644
--- a/cmd/catalog-api/main.go
+++ b/cmd/catalog-api/main.go
@@ -54,6 +54,7 @@ func main() {
 	redisHost, found := os.LookupEnv(constants.REDIS_HOST)
 	if found {
 		redisPort := util.GetEnv(constants.REDIS_PORT, "6379")
+		// TODO: redisDb := util.GetEnv(constants.REDIS_DB, "0")
 		cache = persistence.NewRedisCache(fmt.Sprintf("%s:%s", redisHost, redisPort), constants.REDIS_PASS, time.Hour)
 	} else {
 		cache = persistence.NewInMemoryStore(time.Hour)
diff --git a/constants/constants.go b/constants/constants.go
index 971bedd..555a279 100644
--- a/constants/constants.go
+++ b/constants/constants.go
@@ -14,6 +14,7 @@ const (
 	ERROR           = "ERROR"
 	INFO            = "INFO"
 	LOG_LEVEL       = "LOG_LEVEL"
+	REDIS_DB        = "REDIS_DB"
 	REDIS_HOST      = "REDIS_HOST"
 	REDIS_PASS      = "REDIS_PASS"
 	REDIS_PORT      = "REDIS_PORT"