diff --git a/go.mod b/go.mod
index 7f803290f..af9376e47 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.13
 require (
 	cloud.google.com/go/firestore v1.1.1
 	firebase.google.com/go v3.13.0+incompatible
+	firebase.google.com/go/v4 v4.0.0
 	github.com/DATA-DOG/go-sqlmock v1.4.1 // indirect
 	github.com/blendle/zapdriver v1.3.1
 	github.com/bxcodec/faker v2.0.1+incompatible
diff --git a/go.sum b/go.sum
index 1dc197ea9..31b623446 100644
--- a/go.sum
+++ b/go.sum
@@ -43,6 +43,7 @@ firebase.google.com/go v3.12.1+incompatible h1:lTLxDHUZWtpvrpCUM7AsHbwfmM8DSkVlr
 firebase.google.com/go v3.12.1+incompatible/go.mod h1:xlah6XbEyW6tbfSklcfe5FHJIwjt8toICdV5Wh9ptHs=
 firebase.google.com/go v3.13.0+incompatible h1:3TdYC3DDi6aHn20qoRkxwGqNgdjtblwVAyRLQwGn/+4=
 firebase.google.com/go v3.13.0+incompatible/go.mod h1:xlah6XbEyW6tbfSklcfe5FHJIwjt8toICdV5Wh9ptHs=
+firebase.google.com/go/v4 v4.0.0/go.mod h1:mB8wL5ohyReUeds5IIaA1+pOw3Tk1aybMEwceIQEqVg=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=