diff --git a/src/DependencyBuilder.php b/src/DependencyBuilder.php
index fc90d09..341fc8f 100644
--- a/src/DependencyBuilder.php
+++ b/src/DependencyBuilder.php
@@ -64,8 +64,13 @@ public function areDependenciesMet()
     {
         $dependencies = $this->getDependencies(false);
 
-        foreach ($dependencies as $dependency) {
-            if (false === $dependency['installed'] || false === $dependency['enabled']) {
+        foreach ($dependencies as $dependencyName => $dependency) {
+            if (
+                !array_key_exists('installed', $dependency)
+                || !array_key_exists('enabled', $dependency)
+                || false === $dependency['installed']
+                || false === $dependency['enabled']
+            ) {
                 return false;
             }
         }
@@ -176,10 +181,14 @@ protected function buildRoutesForModule($moduleName)
     {
         $urls = [];
         foreach (['install', 'enable', 'upgrade'] as $action) {
-            $urls[$action] = $this->router->generate('admin_module_manage_action', [
+            $route = $this->router->generate('admin_module_manage_action', [
                 'action' => $action,
                 'module_name' => $moduleName,
             ]);
+
+            if (is_string($route)) {
+                $urls[$action] = $route;
+            }
         }
 
         return $urls;
@@ -210,11 +219,18 @@ protected function buildRouter()
     }
 
     /**
-     * @return array<string,bool|string|int>|null
+     * @param bool $addRoutes
+     *
+     * @return array{
+     *   "name": string,
+     *   "installed": bool,
+     *   "enabled": bool,
+     *   "current_version": string,
+     * }|non-empty-array<string, bool|string>|null
      *
      * @throws \Exception
      */
-    protected function addMboInDependencies()
+    protected function addMboInDependencies($addRoutes = false)
     {
         if (!$this->isMboNeeded()) {
             return null;
@@ -222,18 +238,21 @@ protected function addMboInDependencies()
 
         $mboStatus = (new Presenter())->present();
 
-        if ((bool) $mboStatus['isEnabled']) {
-            return null;
-        }
-
-        $mboRoutes = $this->buildRoutesForModule(Installer::MODULE_NAME);
-
-        return array_merge([
+        $specification = [
             'current_version' => (string) $mboStatus['version'],
             'installed' => (bool) $mboStatus['isInstalled'],
-            'enabled' => false,
+            'enabled' => (bool) $mboStatus['isEnabled'],
             'name' => Installer::MODULE_NAME,
-        ], $mboRoutes);
+        ];
+
+        if (!$addRoutes) {
+            return $specification;
+        }
+
+        return array_merge(
+            $specification,
+            $this->buildRoutesForModule(Installer::MODULE_NAME)
+        );
     }
 
     /**
@@ -247,7 +266,12 @@ protected function isMboNeeded()
     /**
      * @param bool $addRoutes
      *
-     * @return array{}|array{ps_mbo: array<string, bool|string|int>}
+     * @return array<string, array{
+     *       "name": string,
+     *       "installed": bool,
+     *       "enabled": bool,
+     *       "current_version": string,
+     *    }>|array<ps_mbo, non-empty-array<string, bool|string>>
      *
      * @throws \Exception
      */
@@ -256,8 +280,13 @@ private function getDependencies($addRoutes = false)
         $dependenciesContent = $this->getDependenciesSpecification();
 
         if (empty($dependenciesContent['dependencies'])) {
+            $mboDependency = $this->addMboInDependencies($addRoutes);
+            if (null === $mboDependency) {
+                return [];
+            }
+
             return [
-                Installer::MODULE_NAME => $this->addMboInDependencies(),
+                Installer::MODULE_NAME => $mboDependency,
             ];
         }
 
@@ -269,6 +298,10 @@ private function getDependencies($addRoutes = false)
 
         $dependencies = [];
         foreach ($dependenciesContent['dependencies'] as $dependency) {
+            if (!is_array($dependency) || !array_key_exists('name', $dependency)) {
+                continue;
+            }
+
             $dependencyData = \DbCore::getInstance()->getRow(
                 sprintf(
                     'SELECT `id_module`, `active`, `version` FROM `%smodule` WHERE `name` = "%s"',
@@ -303,7 +336,7 @@ private function getDependencies($addRoutes = false)
 
     /**
      * @return array{
-     *     "dependencies": array{}
+     *     "dependencies": array<string, string|int|bool>
      * }
      *
      * @throws \Exception
@@ -318,7 +351,12 @@ private function getDependenciesSpecification()
         if ($fileContent = file_get_contents($dependencyFile)) {
             $dependenciesContent = json_decode($fileContent, true);
         }
-        if (!isset($dependenciesContent) || !is_array($dependenciesContent) || json_last_error() != JSON_ERROR_NONE) {
+        if (
+            !isset($dependenciesContent)
+            || !is_array($dependenciesContent)
+            || !array_key_exists('dependencies', $dependenciesContent)
+            || json_last_error() != JSON_ERROR_NONE
+        ) {
             throw new \Exception(self::DEPENDENCY_FILENAME . ' file may be malformed.');
         }