diff --git a/pf-websocket.Dockerfile b/pf-websocket.Dockerfile
index 58eed9b..7e6d517 100644
--- a/pf-websocket.Dockerfile
+++ b/pf-websocket.Dockerfile
@@ -1,4 +1,4 @@
-FROM composer:2.3.10
+FROM composer:2.8.8
 COPY websocket /app
 WORKDIR /app