diff --git a/cert/cert.go b/cert/cert.go
index 92dd483..3c29762 100644
--- a/cert/cert.go
+++ b/cert/cert.go
@@ -7,6 +7,7 @@ import (
 	"crypto/x509/pkix"
 	"encoding/pem"
 	"math/big"
+	"net"
 	"os"
 	"path"
 	"time"
@@ -35,65 +36,142 @@ func (c *Cert) GenerateSelfSignedCert() error {
 		return nil
 	}
 
-	priv, err := rsa.GenerateKey(rand.Reader, 2048)
+	caCert, caKey, err := createCA()
 	if err != nil {
 		return err
 	}
 
-	serialNumber, _ := rand.Int(rand.Reader, big.NewInt(1<<62))
-
-	template := x509.Certificate{
-		SerialNumber: serialNumber,
-		Subject: pkix.Name{
-			CommonName:   "localhost",
-			Organization: []string{c.Organization},
-		},
-		NotBefore: time.Now(),
-		NotAfter:  time.Now().Add(365 * 24 * time.Hour),
-
-		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
-		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
-		BasicConstraintsValid: true,
-		DNSNames:              []string{"localhost"},
-	}
-
-	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
+	serverCert, serverKey, err := createServerCert(caCert, caKey)
 	if err != nil {
 		return err
 	}
 
-	if _, err := os.Stat(path.Dir(c.CertFile)); os.IsNotExist(err) {
-		os.MkdirAll(path.Dir(c.CertFile), 0700)
-	}
-
-	certOut, err := os.Create(c.CertFile)
-	if err != nil {
-		return err
-	}
-	defer certOut.Close()
-	pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: certDER})
-
-	// Set permission to 0600 (read/write by owner only)
-	if err := os.Chmod(c.CertFile, 0600); err != nil {
+	if err := os.MkdirAll(path.Dir(c.CertFile), 0700); err != nil {
 		return err
 	}
 
-	if _, err := os.Stat(path.Dir(c.KeyFile)); os.IsNotExist(err) {
-		os.MkdirAll(path.Dir(c.KeyFile), 0700)
-	}
-
-	keyOut, err := os.Create(c.KeyFile)
-	if err != nil {
+	if err := os.MkdirAll(path.Dir(c.KeyFile), 0700); err != nil {
 		return err
 	}
-	defer keyOut.Close()
 
-	pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
+	if err := saveCert(c.CertFile, serverCert.Raw); err != nil {
+		return err
+	}
 
-	// Set permission to 0600 (read/write by owner only)
-	if err := os.Chmod(c.KeyFile, 0600); err != nil {
+	if err := saveKey(c.KeyFile, serverKey); err != nil {
 		return err
 	}
 
 	return nil
 }
+
+func createCA() (*x509.Certificate, *rsa.PrivateKey, error) {
+	priv, _ := rsa.GenerateKey(rand.Reader, 2048)
+
+	serial, _ := rand.Int(rand.Reader, big.NewInt(1<<62))
+
+	template := x509.Certificate{
+		SerialNumber: serial,
+		Subject: pkix.Name{
+			CommonName: "Local Dev CA",
+		},
+
+		NotBefore: time.Now(),
+		NotAfter:  time.Now().AddDate(10, 0, 0),
+
+		KeyUsage:              x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
+		BasicConstraintsValid: true,
+		IsCA:                  true,
+	}
+
+	certDER, _ := x509.CreateCertificate(
+		rand.Reader,
+		&template,
+		&template,
+		&priv.PublicKey,
+		priv,
+	)
+
+	cert, _ := x509.ParseCertificate(certDER)
+
+	return cert, priv, nil
+}
+
+func createServerCert(
+	ca *x509.Certificate,
+	caKey *rsa.PrivateKey,
+) (*x509.Certificate, *rsa.PrivateKey, error) {
+
+	priv, _ := rsa.GenerateKey(rand.Reader, 2048)
+	serial, _ := rand.Int(rand.Reader, big.NewInt(1<<62))
+
+	template := x509.Certificate{
+		SerialNumber: serial,
+
+		Subject: pkix.Name{
+			CommonName: "localhost",
+		},
+
+		NotBefore: time.Now(),
+		NotAfter:  time.Now().AddDate(1, 0, 0),
+
+		KeyUsage:    x509.KeyUsageDigitalSignature,
+		ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+
+		DNSNames: []string{
+			"localhost",
+			"lvh.me",
+		},
+
+		IPAddresses: []net.IP{
+			net.ParseIP("127.0.0.1"),
+			net.ParseIP("::1"),
+		},
+	}
+
+	certDER, _ := x509.CreateCertificate(
+		rand.Reader,
+		&template,
+		ca,
+		&priv.PublicKey,
+		caKey,
+	)
+
+	cert, _ := x509.ParseCertificate(certDER)
+
+	return cert, priv, nil
+}
+
+func saveCert(path string, der []byte) error {
+	file, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	if err := pem.Encode(file, &pem.Block{
+		Type:  "CERTIFICATE",
+		Bytes: der,
+	}); err != nil {
+		return err
+	}
+
+	return os.Chmod(path, 0600)
+}
+
+func saveKey(path string, key *rsa.PrivateKey) error {
+	file, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	if err := pem.Encode(file, &pem.Block{
+		Type:  "RSA PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(key),
+	}); err != nil {
+		return err
+	}
+
+	return os.Chmod(path, 0600)
+}
diff --git a/test/dbm_test.go b/test/dbm_test.go
index a03f9e1..59a4eef 100644
--- a/test/dbm_test.go
+++ b/test/dbm_test.go
@@ -3,6 +3,7 @@ package test
 import (
 	"fmt"
 	"math/rand"
+	"os"
 	"runtime"
 	"testing"
 	"time"
@@ -146,3 +147,30 @@ func TestServer(t *testing.T) {
 
 	t.Fatal(server.ServeHttp("http://localhost", 8100))
 }
+
+func TestCreateCerts(t *testing.T) {
+	certFile := "cert.pem"
+	keyFile := "key.pem"
+
+	defer func() {
+		err := os.Remove(certFile)
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = os.Remove(keyFile)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	t.Log("test create certificates")
+	cert := cert.Cert{
+		Organization: "tecamino",
+		CertFile:     certFile,
+		KeyFile:      keyFile,
+	}
+
+	if err := cert.GenerateSelfSignedCert(); err != nil {
+		t.Fatal(err)
+	}
+}