diff --git a/go.mod b/go.mod
index 15df266..b4014a5 100644
--- a/go.mod
+++ b/go.mod
@@ -6,4 +6,5 @@ require (
 	github.com/eclipse/paho.mqtt.golang v1.3.3
 	github.com/gin-gonic/gin v1.7.1
 	github.com/lib/pq v1.10.1
+	github.com/thanhpk/randstr v1.0.4
 )