diff --git a/Dockerfile b/Dockerfile
index 9a679b7..b18fbaa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,8 @@ ENV COMPOSER_ALLOW_SUPERUSER 1
 RUN curl -sS https://getcomposer.org/installer | php \
 	&& mv composer.phar /usr/local/bin/composer
 
-RUN composer require 'staabm/annotate-pull-request-from-checkstyle:1.*'
+RUN composer global require 'staabm/annotate-pull-request-from-checkstyle:1.*'
+ENV PATH /root/.composer/vendor/bin:$PATH
 
 ADD action-entrypoint.sh /usr/local/bin
 
diff --git a/action-entrypoint.sh b/action-entrypoint.sh
index 3eac53f..f8c6924 100755
--- a/action-entrypoint.sh
+++ b/action-entrypoint.sh
@@ -13,4 +13,4 @@ FLAGS=()
 
 IFS=";" read -r -a FILES <<< "$CS2PR_FILES"
 
-vendor/bin/cs2pr "${FLAGS[@]}" "${FILES[@]}"
+cs2pr "${FLAGS[@]}" "${FILES[@]}"