diff --git a/composer.json b/composer.json
index 860b9ac..2d9538a 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0"
+        "php": ">=5.6.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/EagerLoadPivotBuilder.php b/src/EagerLoadPivotBuilder.php
index 7ee2a8d..e7b7ff8 100644
--- a/src/EagerLoadPivotBuilder.php
+++ b/src/EagerLoadPivotBuilder.php
@@ -87,11 +87,15 @@ protected function eagerLoadPivotRelations($models, $pivotAccessor)
      */
     protected function getPivotEagerLoadRelations($pivotAccessor)
     {
-        $relations = array_filter(array_keys($this->eagerLoad), function ($relation) use ($pivotAccessor) {
+        $relations = array_filter($this->eagerLoad, function ($relation) use ($pivotAccessor) {
             return $relation != $pivotAccessor && str_contains($relation, $pivotAccessor);
-        });
-        return array_map(function ($relation) use ($pivotAccessor) {
-            return substr($relation, strlen("{$pivotAccessor}."));
-        }, $relations);
+        }, ARRAY_FILTER_USE_KEY);
+
+        return array_combine(
+            array_map(function ($relation) use ($pivotAccessor) {
+                return substr($relation, strlen("{$pivotAccessor}."));
+            }, array_keys($relations)),
+            array_values($relations)
+        );
     }
 }