diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c7309b0..0f03400 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -61,6 +61,7 @@ jobs:
           - "php:sniff"
           - "php:codestyle"
           - "php:copypaste"
+          - "composer:normalize"
         php-version:
           - 7.4
   code-quality-frontend:
diff --git a/.gitlab/pipeline/.gitlab-ci.yml b/.gitlab/pipeline/.gitlab-ci.yml
index 051300e..f1c6b6b 100644
--- a/.gitlab/pipeline/.gitlab-ci.yml
+++ b/.gitlab/pipeline/.gitlab-ci.yml
@@ -3,6 +3,7 @@ stages:
   - build
   - lint
   - codestyle
+  - normalize
   - test
 
 include:
@@ -296,3 +297,9 @@ php-copypaste-check:
     - php-lint-php7.4
   script:
     - composer ci:php:copypaste
+
+composer-normalize:
+  extends: .default
+  stage: codestyle
+  script:
+    - composer ci:composer:normalize
diff --git a/README.md b/README.md
index 3199d58..2d837eb 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,10 @@ All of those checks are available in Github Actions and in Gitlab CI.
 
 `composer ci:ts:lint`
 
+### Composer Normalize by [composer-normalize](https://github.com/ergebnis/composer-normalize)
+
+`composer ci:composer:normalize`
+
 ### Running unit tests
 
 `composer ci:tests:unit`
diff --git a/composer.json b/composer.json
index fbfec3d..ddf965c 100644
--- a/composer.json
+++ b/composer.json
@@ -79,6 +79,7 @@
 		"ci": [
 			"@ci:static"
 		],
+		"ci:composer:normalize": "php ./tools/composer-normalize.phar --dry-run",
 		"ci:dynamic": [
 			"@ci:tests"
 		],
diff --git a/phive.xml b/phive.xml
index e521599..4662e00 100644
--- a/phive.xml
+++ b/phive.xml
@@ -3,4 +3,5 @@
   <phar name="phar-io/phive" version="^0.14.5" location="./tools/phive.phar" copy="true" installed="0.14.5"/>
   <phar name="phpcpd" version="^6.0.3" location="./tools/phpcpd.phar" copy="true" installed="6.0.3"/>
   <phar name="phpcs" version="^3.5.8" location="./tools/phpcs.phar" copy="true" installed="3.5.8"/>
+  <phar name="ergebnis/composer-normalize" version="^2.13.2" location="./tools/composer-normalize.phar" copy="true" installed="2.13.2"/>
 </phive>
diff --git a/tools/composer-normalize.phar b/tools/composer-normalize.phar
new file mode 100755
index 0000000..3eb8b72
Binary files /dev/null and b/tools/composer-normalize.phar differ