diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 89030cb..9e8ff6c 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -7,6 +7,18 @@ For details, take a look at the following workflow configuration files:
 - [`workflows/integrate.yaml`](workflows/integrate.yaml)
 - [`workflows/release.yaml`](workflows/release.yaml)
 
+## Coding Standards
+
+We are using [`ergebnis/composer-normalize`](https://github.com/ergebnis/composer-normalize) to normalize `composer.json`.
+
+Run
+
+```
+$ make coding-standards
+```
+
+to automatically fix coding standard violations.
+
 ## Tests
 
 We are using [`phpunit/phpunit`](https://github.com/sebastianbergmann/phpunit) to drive the development.
@@ -27,7 +39,7 @@ Run
 $ make
 ```
 
-to run tests!
+to enforce coding standards and run tests!
 
 ## Help
 
diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
index b454b21..17b7d67 100644
--- a/.github/workflows/integrate.yaml
+++ b/.github/workflows/integrate.yaml
@@ -32,6 +32,11 @@ jobs:
       - name: "Validate composer.json and composer.lock"
         run: "composer validate --strict"
 
+      - name: "Run ergebnis/composer-normalize"
+        uses: "docker://ergebnis/composer-normalize-action:0.8.0"
+        with:
+          args: "--dry-run"
+
   tests:
     name: "Tests"
 
diff --git a/Makefile b/Makefile
index 39c8bd3..a41c99e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,9 @@
 .PHONY: it
-it: tests ## Runs the tests target
+it: coding-standards tests ## Runs the coding-standards and tests target
+
+.PHONY: coding-standards
+coding-standards: vendor ## Normalizes composer.json with ergebnis/composer-normalize
+	docker run --interactive --rm --tty --workdir=/app --volume ${PWD}:/app ergebnis/composer-normalize-action:0.8.0
 
 .PHONY: help
 help: ## Displays this list of targets with descriptions
diff --git a/composer.json b/composer.json
index 67d3756..d5ebf68 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,14 @@
     "require": {
         "php": "^5.4 || ^7.0"
     },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8"
+    },
+    "config": {
+        "platform": {
+            "php": "5.4.45"
+        }
+    },
     "autoload": {
         "psr-4": {
             "Tree\\": "src/"
@@ -22,13 +30,5 @@
         "psr-4": {
             "Tree\\Test\\": "tests/"
         }
-    },
-    "config": {
-        "platform": {
-            "php": "5.4.45"
-        }
-    },
-    "require-dev": {
-        "phpunit/phpunit": "^4.8"
     }
 }