diff --git a/Dockerfile b/Dockerfile
index 6cc1182..c635eb0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.19.0 as build
 
 ARG CURL_VERSION=8.5.0
-ARG WS_VERSION=v5.6.4-stable
+ARG WS_VERSION=v5.6.6-stable
 ARG NGH3_VERSION=v1.1.0
 ARG NGTCP2_VERSION=v1.1.0