diff --git a/cmd/task/main.go b/cmd/task/main.go
index 70904007cf6575dc8603fcf937231749b7ab07d4..54315c8e0fcd677e7cdf82edcdabd575b002efee 100644
--- a/cmd/task/main.go
+++ b/cmd/task/main.go
@@ -63,8 +63,9 @@ func main() {
 	db, err := mongo.Connect(
 		context.Background(),
 		options.Client().ApplyURI(cfg.Mongo.Addr).SetAuth(options.Credential{
-			Username: cfg.Mongo.User,
-			Password: cfg.Mongo.Pass,
+			Username:      cfg.Mongo.User,
+			Password:      cfg.Mongo.Pass,
+			AuthMechanism: cfg.Mongo.AuthMechanism,
 		}),
 	)
 	if err != nil {
diff --git a/internal/config/config.go b/internal/config/config.go
index baf99e58046ea65d99026f45a731999db4414c6f..4f0d2b6b7506c30975dd3c2c3fb4c729675a258f 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -31,9 +31,10 @@ type authConfig struct {
 }
 
 type mongoConfig struct {
-	Addr string `envconfig:"MONGO_ADDR" required:"true"`
-	User string `envconfig:"MONGO_USER" required:"true"`
-	Pass string `envconfig:"MONGO_PASS" required:"true"`
+	Addr          string `envconfig:"MONGO_ADDR" required:"true"`
+	User          string `envconfig:"MONGO_USER" required:"true"`
+	Pass          string `envconfig:"MONGO_PASS" required:"true"`
+	AuthMechanism string `envconfig:"MONGO_AUTH_MECHANISM" default:"SCRAM-SHA-1"`
 }
 
 type policyConfig struct {