diff --git a/conn.go b/conn.go
index 3daca6250..743c5032c 100644
--- a/conn.go
+++ b/conn.go
@@ -46,6 +46,8 @@ import (
 var (
 	defaultApprovedAuthenticators = []string{
 		"org.apache.cassandra.auth.PasswordAuthenticator",
+		"org.apache.cassandra.auth.MutualTlsAuthenticator",
+		"org.apache.cassandra.auth.MutualTlsWithPasswordFallbackAuthenticator",
 		"com.instaclustr.cassandra.auth.SharedSecretAuthenticator",
 		"com.datastax.bdp.cassandra.auth.DseAuthenticator",
 		"io.aiven.cassandra.auth.AivenAuthenticator",
diff --git a/conn_test.go b/conn_test.go
index cab4c2f8f..ef61c1b1c 100644
--- a/conn_test.go
+++ b/conn_test.go
@@ -56,6 +56,8 @@ const (
 func TestApprove(t *testing.T) {
 	tests := map[bool]bool{
 		approve("org.apache.cassandra.auth.PasswordAuthenticator", []string{}):                                          true,
+		approve("org.apache.cassandra.auth.MutualTlsWithPasswordFallbackAuthenticator", []string{}):                     true,
+		approve("org.apache.cassandra.auth.MutualTlsAuthenticator", []string{}):                                         true,
 		approve("com.instaclustr.cassandra.auth.SharedSecretAuthenticator", []string{}):                                 true,
 		approve("com.datastax.bdp.cassandra.auth.DseAuthenticator", []string{}):                                         true,
 		approve("io.aiven.cassandra.auth.AivenAuthenticator", []string{}):                                               true,