Index: trunk/src/org/openstreetmap/josm/io/CertificateAmendment.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/CertificateAmendment.java	(revision 19646)
+++ trunk/src/org/openstreetmap/josm/io/CertificateAmendment.java	(revision 19650)
@@ -235,5 +235,5 @@
             TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
             tmf.init(keyStore);
-            SSLContext sslContext = SSLContext.getInstance("TLSv1.2");
+            SSLContext sslContext = SSLContext.getInstance("TLSv1.3");
             sslContext.init(null, tmf.getTrustManagers(), null);
             SSLContext.setDefault(sslContext);