diff --git a/internal/service/dms/endpoint.go b/internal/service/dms/endpoint.go
index <HASH>..<HASH> 100644
--- a/internal/service/dms/endpoint.go
+++ b/internal/service/dms/endpoint.go
@@ -369,7 +369,7 @@ func ResourceEndpoint() *schema.Resource {
 						},
 						"ssl_security_protocol": {
 							Type:         schema.TypeString,
-							Required:     true,
+							Optional:     true,
 							ValidateFunc: validation.StringInSlice(dms.SslSecurityProtocolValue_Values(), false),
 						},
 					},
r/aws_dms_endpoint: 'redis_settings.ssl_security_protocol' is Optional.