diff --git a/Dockerfile b/Dockerfile
index c57b8cc..2b347e6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM composer@sha256:d374b2e1f715621e9d9929575d6b35b11cf4a6dc237d4a08f2e6d1611f534675 as composer
+FROM composer@sha256:12cd736fa74a5ed126b1fe11dc3695380e445b46a4ec7de53203c275d792ead0 as composer
 # composer is pinned at a PHP 7 version
 
 WORKDIR /installing