diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 96ee105..8058551 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -331,6 +331,11 @@
     }
 #endif
 
+#ifdef TLS1_3_VERSION
+    SSL_CTX_set_min_proto_version(ssl->ctx, 0);
+    SSL_CTX_set_max_proto_version(ssl->ctx, TLS1_3_VERSION);
+#endif
+
 #ifdef SSL_OP_NO_COMPRESSION
     SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_COMPRESSION);
 #endif