diff --git a/Dockerfile b/Dockerfile
index 8f7d6ca..a9ac789 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM composer:1.8.4 as builder
+FROM composer:1.10.7 as builder
 
 COPY . /opt/phpdoc
 WORKDIR /opt/phpdoc