diff --git a/libnetwork/drivers/overlay/ovmanager/ovmanager.go b/libnetwork/drivers/overlay/ovmanager/ovmanager.go
index fcb0ea9cff..effd53005f 100644
--- a/libnetwork/drivers/overlay/ovmanager/ovmanager.go
+++ b/libnetwork/drivers/overlay/ovmanager/ovmanager.go
@@ -117,9 +117,9 @@ func (d *driver) NetworkAllocate(id string, option map[string]string, ipV4Data,
 		n.subnets = append(n.subnets, s)
 	}
 
-	val := fmt.Sprintf("%d", n.subnets[0].vni)
+	val := strconv.FormatUint(uint64(n.subnets[0].vni), 10)
 	for _, s := range n.subnets[1:] {
-		val = val + fmt.Sprintf(",%d", s.vni)
+		val = val + "," + strconv.FormatUint(uint64(s.vni), 10)
 	}
 	opts[netlabel.OverlayVxlanIDList] = val
 
diff --git a/libnetwork/drivers/windows/windows.go b/libnetwork/drivers/windows/windows.go
index 5a0496fded..7695dbc9e5 100644
--- a/libnetwork/drivers/windows/windows.go
+++ b/libnetwork/drivers/windows/windows.go
@@ -71,12 +71,12 @@ type hnsEndpoint struct {
 	nid       string
 	profileID string
 	Type      string
-	//Note: Currently, the sandboxID is the same as the containerID since windows does
-	//not expose the sandboxID.
-	//In the future, windows will support a proper sandboxID that is different
-	//than the containerID.
-	//Therefore, we are using sandboxID now, so that we won't have to change this code
-	//when windows properly supports a sandboxID.
+	// Note: Currently, the sandboxID is the same as the containerID since windows does
+	// not expose the sandboxID.
+	// In the future, windows will support a proper sandboxID that is different
+	// than the containerID.
+	// Therefore, we are using sandboxID now, so that we won't have to change this code
+	// when windows properly supports a sandboxID.
 	sandboxID      string
 	macAddress     net.HardwareAddr
 	epOption       *endpointOption       // User specified parameters
@@ -377,8 +377,8 @@ func (d *driver) CreateNetwork(id string, option map[string]interface{}, nInfo d
 		for i, subnet := range hnsresponse.Subnets {
 			var gwIP, subnetIP *net.IPNet
 
-			//The gateway returned from HNS is an IPAddress.
-			//We need to convert it to an IPNet to use as the Gateway of driverapi.IPAMData struct
+			// The gateway returned from HNS is an IPAddress.
+			// We need to convert it to an IPNet to use as the Gateway of driverapi.IPAMData struct
 			gwCIDR := subnet.GatewayAddress + "/32"
 			_, gwIP, err = net.ParseCIDR(gwCIDR)
 			if err != nil {
diff --git a/libnetwork/networkdb/networkdbdiagnostic.go b/libnetwork/networkdb/networkdbdiagnostic.go
index f729930314..c1cbe130ac 100644
--- a/libnetwork/networkdb/networkdbdiagnostic.go
+++ b/libnetwork/networkdb/networkdbdiagnostic.go
@@ -61,7 +61,7 @@ func dbJoin(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(nil), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbPeers(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -95,7 +95,7 @@ func dbPeers(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(rsp), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbClusterPeers(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -118,7 +118,7 @@ func dbClusterPeers(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(rsp), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbCreateEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -167,7 +167,7 @@ func dbCreateEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(nil), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbUpdateEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -215,7 +215,7 @@ func dbUpdateEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(nil), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbDeleteEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -252,7 +252,7 @@ func dbDeleteEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(nil), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbGetEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -298,7 +298,7 @@ func dbGetEntry(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(rsp), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbJoinNetwork(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -330,7 +330,7 @@ func dbJoinNetwork(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(nil), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbLeaveNetwork(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -362,7 +362,7 @@ func dbLeaveNetwork(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(nil), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbGetTable(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -410,7 +410,7 @@ func dbGetTable(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, diagnostic.CommandSucceed(rsp), json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
 
 func dbNetworkStats(ctx interface{}, w http.ResponseWriter, r *http.Request) {
@@ -448,5 +448,5 @@ func dbNetworkStats(ctx interface{}, w http.ResponseWriter, r *http.Request) {
 		diagnostic.HTTPReply(w, rsp, json)
 		return
 	}
-	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf("%s", dbNotAvailable)), json)
+	diagnostic.HTTPReply(w, diagnostic.FailCommand(fmt.Errorf(dbNotAvailable)), json)
 }
diff --git a/libnetwork/service_linux.go b/libnetwork/service_linux.go
index 1900c75fee..bbe23783c7 100644
--- a/libnetwork/service_linux.go
+++ b/libnetwork/service_linux.go
@@ -600,7 +600,7 @@ func invokeFWMarker(path string, vip net.IP, fwMark uint32, ingressPorts []*Port
 
 	cmd := &exec.Cmd{
 		Path:   reexec.Self(),
-		Args:   append([]string{"fwmarker"}, path, vip.String(), fmt.Sprintf("%d", fwMark), addDelOpt, ingressPortsFile, eIP.String(), lbMode),
+		Args:   append([]string{"fwmarker"}, path, vip.String(), strconv.FormatUint(uint64(fwMark), 10), addDelOpt, ingressPortsFile, eIP.String(), lbMode),
 		Stdout: os.Stdout,
 		Stderr: os.Stderr,
 	}
diff --git a/libnetwork/types/types.go b/libnetwork/types/types.go
index e4ade05902..caf9328bae 100644
--- a/libnetwork/types/types.go
+++ b/libnetwork/types/types.go
@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"fmt"
 	"net"
+	"strconv"
 	"strings"
 
 	"github.com/ishidawataru/sctp"
@@ -202,7 +203,7 @@ func (p Protocol) String() string {
 	case SCTP:
 		return "sctp"
 	default:
-		return fmt.Sprintf("%d", p)
+		return strconv.Itoa(int(p))
 	}
 }