diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index daa28ff..1e6fc96 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -4451,7 +4451,21 @@
             return -1;
         }
 
-        return (i == 0) ? 1 : 2 /* renew */;
+        /* renew if TLSv1.3 */
+
+#ifdef TLS1_3_VERSION
+        if (SSL_version(ssl_conn) == TLS1_3_VERSION) {
+            return 2;
+        }
+#endif
+
+        /* renew if non-default key */
+
+        if (i != 0) {
+            return 2;
+        }
+
+        return 1;
     }
 }