--- Modules/_ssl.c
+++ Modules/_ssl.c
@@ -311,6 +311,8 @@
 		goto fail;
 	}
 
+    SSL_CTX_set_options(self->ctx, SSL_OP_ALL); /* ssl compatibility */
+
 	if (certreq != PY_SSL_CERT_NONE) {
 		if (cacerts_file == NULL) {
 			errstr = ERRSTR("No root certificates specified for "