diff --git a/Dockerfile b/Dockerfile
index c57b8cc..9d10b60 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM composer@sha256:d374b2e1f715621e9d9929575d6b35b11cf4a6dc237d4a08f2e6d1611f534675 as composer
+FROM composer@sha256:7f8ba7d2760305e378716ed5cf31932843372467e61ebb5047c7ae754bfadba4 as composer
 # composer is pinned at a PHP 7 version
 
 WORKDIR /installing