diff --git a/Dockerfile b/Dockerfile
index c57b8cc..df6ac1b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM composer@sha256:d374b2e1f715621e9d9929575d6b35b11cf4a6dc237d4a08f2e6d1611f534675 as composer
+FROM composer@sha256:26bbf85fccb36247181de6f4a2beddac47d4b352c0c19249a3b4fa2abf1e38ad as composer
 # composer is pinned at a PHP 7 version
 
 WORKDIR /installing