diff --git a/client.go b/client.go
index 2b62e03..6d2fd4b 100644
--- a/client.go
+++ b/client.go
@@ -179,6 +179,7 @@ func (c *Client) Send(req *Request) (*Response, error) {
 	// Connect to the host
 	config := &tls.Config{
 		InsecureSkipVerify: true,
+		MinVersion:         tls.VersionTLS12,
 		Certificates:       []tls.Certificate{req.Certificate},
 		VerifyPeerCertificate: func(rawCerts [][]byte, _ [][]*x509.Certificate) error {
 			// Parse the certificate
diff --git a/server.go b/server.go
index 57ef415..60af4a7 100644
--- a/server.go
+++ b/server.go
@@ -49,6 +49,7 @@ func (s *Server) ListenAndServe() error {
 
 	config := &tls.Config{
 		InsecureSkipVerify: true,
+		MinVersion:         tls.VersionTLS12,
 		Certificates:       []tls.Certificate{s.Certificate},
 		ClientAuth:         tls.RequestClientCert,
 	}