diff --git a/prometheus/examples_test.go b/prometheus/examples_test.go
index 5283569..5f909a6 100644
--- a/prometheus/examples_test.go
+++ b/prometheus/examples_test.go
@@ -23,10 +23,10 @@ import (
 	"strings"
 	"time"
 
-	dto "github.com/prometheus/client_model/go"
+	"github.com/golang/protobuf/proto"
 	"github.com/prometheus/common/expfmt"
 
-	"github.com/golang/protobuf/proto"
+	dto "github.com/prometheus/client_model/go"
 
 	"github.com/prometheus/client_golang/prometheus"
 )
diff --git a/prometheus/metric.go b/prometheus/metric.go
index a2da491..06897f2 100644
--- a/prometheus/metric.go
+++ b/prometheus/metric.go
@@ -18,6 +18,7 @@ import (
 	"time"
 
 	"github.com/gogo/protobuf/proto"
+
 	dto "github.com/prometheus/client_model/go"
 )