diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index e18480c..987b381 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -368,6 +368,10 @@
     SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_ANTI_REPLAY);
 #endif
 
+#ifdef SSL_OP_NO_CLIENT_RENEGOTIATION
+    SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_CLIENT_RENEGOTIATION);
+#endif
+
 #ifdef SSL_MODE_RELEASE_BUFFERS
     SSL_CTX_set_mode(ssl->ctx, SSL_MODE_RELEASE_BUFFERS);
 #endif