diff --git a/Dockerfile b/Dockerfile
index bf0ee8967839368c20e0489433908e681e99d9f3..50db38491c4471a8686094b658fea04540664b83 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -117,7 +117,7 @@ RUN echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu bionic main" > /etc/apt
     rm -rf /var/lib/apt/lists/*
 
 # renovate: datasource=github-releases depName=composer/composer
-ENV COMPOSER_VERSION=1.10.1
+ENV COMPOSER_VERSION=1.10.5
 
 RUN php -r "copy('https://github.com/composer/composer/releases/download/$COMPOSER_VERSION/composer.phar', '/usr/local/bin/composer');"