Index: src/tlsgnutlsclient.cpp
===================================================================
--- src/tlsgnutlsclient.cpp	(revision 4882)
+++ src/tlsgnutlsclient.cpp	(working copy)
@@ -55,7 +55,7 @@
     }
 
 #if GNUTLS_VERSION_NUMBER >= 0x020600
-    int ret = gnutls_priority_set_direct( *m_session, "SECURE128:+PFS:+COMP-ALL:+VERS-TLS-ALL:-VERS-SSL3.0:+SIGN-ALL:+CURVE-ALL", 0 );
+    int ret = gnutls_priority_set_direct( *m_session, "SECURE128:+PFS:+COMP-ALL:+VERS-TLS-ALL:-VERS-SSL3.0:-VERS-TLS1.3:+SIGN-ALL:+CURVE-ALL", 0 );
     if( ret != GNUTLS_E_SUCCESS )
       return false;
 #else