diff --git a/internal/conf/config.go b/internal/conf/config.go
index fd81b0ff..ed652c7a 100644
--- a/internal/conf/config.go
+++ b/internal/conf/config.go
@@ -38,6 +38,7 @@ func setDefaultConfig() {
 	viper.SetDefault("Server.AssetsPath", "./assets")
 	viper.SetDefault("Server.ReadTimeoutSec", 5)
 	viper.SetDefault("Server.WriteTimeoutSec", 30)
+	viper.SetDefault("Server.TransformFunctions", []string{})
 
 	viper.SetDefault("Database.DbPoolMaxConnLifeTime", "1h")
 	viper.SetDefault("Database.DbPoolMaxConns", 4)