diff --git a/cert/cert.go b/cert/cert.go
index bdf4834..084a5f7 100644
--- a/cert/cert.go
+++ b/cert/cert.go
@@ -33,7 +33,7 @@ import (
 	"math"
 	"math/big"
 	"net"
-	"path"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -161,8 +161,8 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a
 	maxAge := time.Hour * 24 * 365          // one year self-signed certs
 
 	baseName := fmt.Sprintf("%s_%s_%s", host, strings.Join(ipsToStrings(alternateIPs), "-"), strings.Join(alternateDNS, "-"))
-	certFixturePath := path.Join(fixtureDirectory, baseName+".crt")
-	keyFixturePath := path.Join(fixtureDirectory, baseName+".key")
+	certFixturePath := filepath.Join(fixtureDirectory, baseName+".crt")
+	keyFixturePath := filepath.Join(fixtureDirectory, baseName+".key")
 	if len(fixtureDirectory) > 0 {
 		cert, err := ioutil.ReadFile(certFixturePath)
 		if err == nil {