diff --git a/PhpStormStubsMap.php b/PhpStormStubsMap.php
index 1924853eb..3b047654b 100644
--- a/PhpStormStubsMap.php
+++ b/PhpStormStubsMap.php
@@ -693,6 +693,7 @@ final class PhpStormStubsMap
   'MongoDB\\Driver\\Monitoring\\CommandStartedEvent' => 'mongodb/Monitoring/CommandStartedEvent.php',
   'MongoDB\\Driver\\Monitoring\\CommandSubscriber' => 'mongodb/Monitoring/CommandSubscriber.php',
   'MongoDB\\Driver\\Monitoring\\CommandSucceededEvent' => 'mongodb/Monitoring/CommandSucceededEvent.php',
+  'MongoDB\\Driver\\Monitoring\\LogSubscriber' => 'mongodb/Monitoring/LogSubscriber.php',
   'MongoDB\\Driver\\Monitoring\\SDAMSubscriber' => 'mongodb/Monitoring/SDAMSubscriber.php',
   'MongoDB\\Driver\\Monitoring\\ServerChangedEvent' => 'mongodb/Monitoring/ServerChangedEvent.php',
   'MongoDB\\Driver\\Monitoring\\ServerClosedEvent' => 'mongodb/Monitoring/ServerClosedEvent.php',
diff --git a/mongodb/BSON/Document.php b/mongodb/BSON/Document.php
index 86cb17aec..37b3fe610 100644
--- a/mongodb/BSON/Document.php
+++ b/mongodb/BSON/Document.php
@@ -28,6 +28,18 @@ final public function toCanonicalExtendedJSON(): string {}
 
     final public function toRelaxedExtendedJSON(): string {}
 
+    /** @since 1.17.0 */
+    public function offsetExists(mixed $offset): bool {}
+
+    /** @since 1.17.0 */
+    public function offsetGet(mixed $offset): mixed {}
+
+    /** @since 1.17.0 */
+    public function offsetSet(mixed $offset, mixed $value): void {}
+
+    /** @since 1.17.0 */
+    public function offsetUnset(mixed $offset): void {}
+
     final public function __toString(): string {}
 
     final public static function __set_state(array $properties): Document {}
diff --git a/mongodb/BSON/PackedArray.php b/mongodb/BSON/PackedArray.php
index 4fc63d8d5..1cb83bfdb 100644
--- a/mongodb/BSON/PackedArray.php
+++ b/mongodb/BSON/PackedArray.php
@@ -20,6 +20,18 @@ final public function has(int $index): bool {}
 
     final public function toPHP(?array $typeMap = null): array|object {}
 
+    /** @since 1.17.0 */
+    public function offsetExists(mixed $offset): bool {}
+
+    /** @since 1.17.0 */
+    public function offsetGet(mixed $offset): mixed {}
+
+    /** @since 1.17.0 */
+    public function offsetSet(mixed $offset, mixed $value): void {}
+
+    /** @since 1.17.0 */
+    public function offsetUnset(mixed $offset): void {}
+
     final public function __toString(): string {}
 
     final public static function __set_state(array $properties): PackedArray {}
diff --git a/mongodb/BSON/Persistable.php b/mongodb/BSON/Persistable.php
index e31ca6bcb..23fc356b0 100644
--- a/mongodb/BSON/Persistable.php
+++ b/mongodb/BSON/Persistable.php
@@ -2,8 +2,14 @@
 
 namespace MongoDB\BSON;
 
+use stdClass;
+
 /**
  * Classes may implement this interface to take advantage of automatic ODM (object document mapping) behavior in the driver.
  * @link https://php.net/manual/en/class.mongodb-bson-persistable.php
  */
-interface Persistable extends Unserializable, Serializable {}
+interface Persistable extends Unserializable, Serializable
+{
+    /** @since 1.17.0 */
+    public function bsonSerialize(): array|stdClass|Document;
+}
diff --git a/mongodb/BSON/Serializable.php b/mongodb/BSON/Serializable.php
index 57b242f62..a6e6995ed 100644
--- a/mongodb/BSON/Serializable.php
+++ b/mongodb/BSON/Serializable.php
@@ -2,6 +2,8 @@
 
 namespace MongoDB\BSON;
 
+use stdClass;
+
 /**
  * Classes that implement this interface may return data to be serialized as a BSON array or document in lieu of the object's public properties
  * @link https://php.net/manual/en/class.mongodb-bson-serializable.php
@@ -14,7 +16,6 @@ interface Serializable extends Type
      * Root documents (e.g. a MongoDB\BSON\Serializable passed to MongoDB\BSON\fromPHP()) will always be serialized as a BSON document.
      * For field values, associative arrays and stdClass instances will be serialized as a BSON document and sequential arrays (i.e. sequential, numeric indexes starting at 0) will be serialized as a BSON array.
      * @link https://php.net/manual/en/mongodb-bson-serializable.bsonserialize.php
-     * @return array|object An array or stdClass to be serialized as a BSON array or document.
      */
-    public function bsonSerialize();
+    public function bsonSerialize(): array|stdClass|Document|PackedArray;
 }
diff --git a/mongodb/Monitoring/LogSubscriber.php b/mongodb/Monitoring/LogSubscriber.php
new file mode 100644
index 000000000..362251c91
--- /dev/null
+++ b/mongodb/Monitoring/LogSubscriber.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace MongoDB\Driver\Monitoring;
+
+/**
+ * @since 1.17.0
+ * @link https://www.php.net/manual/en/class.mongodb-driver-monitoring-logsubscriber.php
+ */
+interface LogSubscriber extends Subscriber
+{
+    public const LEVEL_ERROR = 0;
+    public const LEVEL_CRITICAL = 1;
+    public const LEVEL_WARNING = 2;
+    public const LEVEL_MESSAGE = 3;
+    public const LEVEL_INFO = 4;
+    public const LEVEL_DEBUG = 5;
+
+    /* MONGOC_LOG_LEVEL_TRACE is intentionally omitted. Trace logs are only
+     * reported via streams (i.e. mongodb.debug INI), so the constant is not
+     * relevant to LogSubscriber implementations. */
+
+    public function log(int $level, string $domain, string $message): void;
+}
diff --git a/mongodb/ReadConcern.php b/mongodb/ReadConcern.php
index a2f8a0f3d..f26eb86e7 100644
--- a/mongodb/ReadConcern.php
+++ b/mongodb/ReadConcern.php
@@ -5,6 +5,7 @@
 use MongoDB\BSON\Serializable;
 use MongoDB\Driver\Exception\InvalidArgumentException;
 use MongoDB\Driver\Exception\UnexpectedValueException;
+use stdClass;
 
 /**
  * MongoDB\Driver\ReadConcern controls the level of isolation for read operations for replica sets and replica set shards. This option requires the WiredTiger storage engine and MongoDB 3.2 or later.
@@ -51,7 +52,7 @@ final public function getLevel(): ?string {}
      * @link https://php.net/manual/en/mongodb-driver-readconcern.bsonserialize.php
      * @since 1.2.0
      */
-    final public function bsonSerialize(): array|object {}
+    final public function bsonSerialize(): stdClass {}
 
     /**
      * Checks if this is the default read concern
diff --git a/mongodb/ReadPreference.php b/mongodb/ReadPreference.php
index 3890e3f71..cadb4e7e4 100644
--- a/mongodb/ReadPreference.php
+++ b/mongodb/ReadPreference.php
@@ -5,6 +5,7 @@
 use MongoDB\BSON\Serializable;
 use MongoDB\Driver\Exception\InvalidArgumentException;
 use MongoDB\Driver\Exception\UnexpectedValueException;
+use stdClass;
 
 /**
  * Class ReadPreference
@@ -99,7 +100,7 @@ final public function getTagSets(): array {}
      * @return object Returns an object for serializing the WriteConcern as BSON.
      * @throws InvalidArgumentException
      */
-    final public function bsonSerialize(): array|object {}
+    final public function bsonSerialize(): stdClass {}
 
     /**
      * Serialize a ReadPreference
diff --git a/mongodb/ServerApi.php b/mongodb/ServerApi.php
index 42a332398..da4a8c015 100644
--- a/mongodb/ServerApi.php
+++ b/mongodb/ServerApi.php
@@ -2,6 +2,8 @@
 
 namespace MongoDB\Driver;
 
+use stdClass;
+
 final class ServerApi implements \MongoDB\BSON\Serializable, \Serializable
 {
     public const V1 = 1;
@@ -14,5 +16,5 @@ final public function unserialize(string $data): void {}
 
     final public function serialize(): string {}
 
-    final public function bsonSerialize(): array|object {}
+    final public function bsonSerialize(): stdClass {}
 }
diff --git a/mongodb/WriteConcern.php b/mongodb/WriteConcern.php
index a4d013cb7..26b6be8b6 100644
--- a/mongodb/WriteConcern.php
+++ b/mongodb/WriteConcern.php
@@ -5,6 +5,7 @@
 use MongoDB\BSON\Serializable;
 use MongoDB\Driver\Exception\InvalidArgumentException;
 use MongoDB\Driver\Exception\UnexpectedValueException;
+use stdClass;
 
 /**
  * WriteConcern controls the acknowledgment of a write operation, specifies the level of write guarantee for Replica Sets.
@@ -53,7 +54,7 @@ final public function getWtimeout(): int {}
      * @return array|object Returns an object for serializing the WriteConcern as BSON.
      * @throws InvalidArgumentException
      */
-    final public function bsonSerialize(): array|object {}
+    final public function bsonSerialize(): stdClass {}
 
     /**
      * Serialize a WriteConcern