diff --git a/src/Collection.php b/src/Collection.php
index 3980e8d..ac1c09f 100644
--- a/src/Collection.php
+++ b/src/Collection.php
@@ -6,6 +6,9 @@
 use MongoDB\BSON\ObjectID;
 use MongoDB\Collection as MongoCollection;
 
+/**
+ * @mixin MongoCollection
+ */
 class Collection
 {
     /**
diff --git a/src/Connection.php b/src/Connection.php
index 3a3d235..2786420 100644
--- a/src/Connection.php
+++ b/src/Connection.php
@@ -12,6 +12,9 @@
 use MongoDB\Database;
 use Throwable;
 
+/**
+ * @mixin Database
+ */
 class Connection extends BaseConnection
 {
     use ManagesTransactions;
diff --git a/src/Eloquent/Casts/BinaryUuid.php b/src/Eloquent/Casts/BinaryUuid.php
index 1ca9d40..8c8628f 100644
--- a/src/Eloquent/Casts/BinaryUuid.php
+++ b/src/Eloquent/Casts/BinaryUuid.php
@@ -46,7 +46,7 @@ public function get($model, string $key, $value, array $attributes)
      * @param  string  $key
      * @param  mixed  $value
      * @param  array  $attributes
-     * @return mixed
+     * @return Binary
      */
     public function set($model, string $key, $value, array $attributes)
     {
diff --git a/src/Eloquent/EmbedsRelations.php b/src/Eloquent/EmbedsRelations.php
index 95231a5..cd921d6 100644
--- a/src/Eloquent/EmbedsRelations.php
+++ b/src/Eloquent/EmbedsRelations.php
@@ -6,6 +6,9 @@
 use Jenssegers\Mongodb\Relations\EmbedsMany;
 use Jenssegers\Mongodb\Relations\EmbedsOne;
 
+/**
+ * Embeds relations for MongoDB models.
+ */
 trait EmbedsRelations
 {
     /**
diff --git a/src/Eloquent/HybridRelations.php b/src/Eloquent/HybridRelations.php
index 398d26f..bb544f9 100644
--- a/src/Eloquent/HybridRelations.php
+++ b/src/Eloquent/HybridRelations.php
@@ -12,6 +12,10 @@
 use Jenssegers\Mongodb\Relations\MorphMany;
 use Jenssegers\Mongodb\Relations\MorphTo;
 
+/**
+ * Cross-database relationships between SQL and MongoDB.
+ * Use this trait in SQL models to define relationships with MongoDB models.
+ */
 trait HybridRelations
 {
     /**
diff --git a/src/Query/Builder.php b/src/Query/Builder.php
index 0e6a826..b5141a0 100644
--- a/src/Query/Builder.php
+++ b/src/Query/Builder.php
@@ -788,9 +788,9 @@ public function raw($expression = null)
     /**
      * Append one or more values to an array.
      *
-     * @param  mixed  $column
-     * @param  mixed  $value
-     * @param  bool  $unique
+     * @param  string|array  $column
+     * @param  mixed         $value
+     * @param  bool          $unique
      * @return int
      */
     public function push($column, $value = null, $unique = false)
@@ -818,14 +818,14 @@ public function push($column, $value = null, $unique = false)
     /**
      * Remove one or more values from an array.
      *
-     * @param  mixed  $column
-     * @param  mixed  $value
+     * @param  string|array  $column
+     * @param  mixed         $value
      * @return int
      */
     public function pull($column, $value = null)
     {
         // Check if we passed an associative array.
-        $batch = (is_array($value) && array_keys($value) === range(0, count($value) - 1));
+        $batch = is_array($value) && array_is_list($value);
 
         // If we are pulling multiple values, we need to use $pullAll.
         $operator = $batch ? '$pullAll' : '$pull';
@@ -842,7 +842,7 @@ public function pull($column, $value = null)
     /**
      * Remove one or more fields.
      *
-     * @param  mixed  $columns
+     * @param  string|string[]  $columns
      * @return int
      */
     public function drop($columns)