diff --git a/Dockerfile b/Dockerfile
index d1c9961..17acb7a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM composer:2.1.0 as builder
+FROM composer:2.1.14 as builder
 
 COPY . /opt/phpdoc
 WORKDIR /opt/phpdoc