diff -up libvncserver-LibVNCServer-0.9.13/libvncclient/tls_gnutls.c.crypto_policy libvncserver-LibVNCServer-0.9.13/libvncclient/tls_gnutls.c
--- libvncserver-LibVNCServer-0.9.13/libvncclient/tls_gnutls.c.crypto_policy	2020-06-13 13:49:53.000000000 -0500
+++ libvncserver-LibVNCServer-0.9.13/libvncclient/tls_gnutls.c	2020-07-02 08:00:54.304902893 -0500
@@ -29,8 +29,8 @@
 #include "tls.h"
 
 
-static const char *rfbTLSPriority = "NORMAL:+DHE-DSS:+RSA:+DHE-RSA:+SRP";
-static const char *rfbAnonTLSPriority= "NORMAL:+ANON-DH";
+static const char *rfbTLSPriority = "@SYSTEM";
+static const char *rfbAnonTLSPriority= "@SYSTEM:+ANON-DH";
 
 #define DH_BITS 1024
 static gnutls_dh_params_t rfbDHParams;
diff -up libvncserver-LibVNCServer-0.9.13/libvncserver/rfbssl_gnutls.c.crypto_policy libvncserver-LibVNCServer-0.9.13/libvncserver/rfbssl_gnutls.c