diff --git a/composer-dependency-analyser.php b/composer-dependency-analyser.php
index 9cbddfd0f..f63473280 100644
--- a/composer-dependency-analyser.php
+++ b/composer-dependency-analyser.php
@@ -77,5 +77,6 @@ return $config
     ], [ErrorType::UNUSED_DEPENDENCY])
     ->ignoreErrorsOnPackages([
         'guzzlehttp/streams',
+        'monolog/monolog',
     ], [ErrorType::PROD_DEPENDENCY_ONLY_IN_DEV])
 ;
diff --git a/composer.json b/composer.json
index e65e08d66..376837246 100644
--- a/composer.json
+++ b/composer.json
@@ -88,6 +88,7 @@
         "lcobucci/jwt": "^4.3",
         "mgargano/simplehtmldom": "^1.5",
         "mnapoli/piwik-twig-extension": "^3.0",
+        "monolog/monolog": "^2.9",
         "nelmio/api-doc-bundle": "^4.20.0",
         "nelmio/cors-bundle": "^2.4",
         "ocramius/proxy-manager": "^2.1.1",
diff --git a/composer.lock b/composer.lock
index 5e1860786..e2e3f43dd 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b4bed82c94eb29b60de00db6da3ddd89",
+    "content-hash": "fd1575854b97b1e24163f38d94437f04",
     "packages": [
         {
             "name": "babdev/pagerfanta-bundle",