diff --git a/prometheus/prometheus.go b/prometheus/prometheus.go
index 27324a7..fb1aa28 100644
--- a/prometheus/prometheus.go
+++ b/prometheus/prometheus.go
@@ -140,7 +140,8 @@ type Metric struct {
 	Buckets         []float64
 }
 
-// Prometheus contains the metrics gathered by the instance and its path
+// Prometheus contains the metrics gathered by the instance and its path.
+//
 // Deprecated: use echoprometheus package instead
 type Prometheus struct {
 	reqCnt               *prometheus.CounterVec
@@ -175,7 +176,8 @@ type PushGateway struct {
 	Job string
 }
 
-// NewPrometheus generates a new set of metrics with a certain subsystem name
+// NewPrometheus generates a new set of metrics with a certain subsystem name.
+//
 // Deprecated: use echoprometheus package instead
 func NewPrometheus(subsystem string, skipper middleware.Skipper, customMetricsList ...[]*Metric) *Prometheus {
 	var metricsList []*Metric
@@ -301,7 +303,8 @@ func (p *Prometheus) startPushTicker() {
 	}()
 }
 
-// NewMetric associates prometheus.Collector based on Metric.Type
+// NewMetric associates prometheus.Collector based on Metric.Type.
+//
 // Deprecated: use echoprometheus package instead
 func NewMetric(m *Metric, subsystem string) prometheus.Collector {
 	var metric prometheus.Collector