diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2cca05d..2f50ea6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## v0.6.4
+
+- Guarantee the internal `SessionActor` is dropped before `ServerExt::on_disconnect` is called.
+
+
 ## v0.6.3
 
 - Allow users to use tokio v2.4.0 in their projects. See [#106](https://github.com/gbaranski/ezsockets/pull/106).
diff --git a/src/session.rs b/src/session.rs
index ca7d2dd..100e8b5 100644
--- a/src/session.rs
+++ b/src/session.rs
@@ -73,7 +73,7 @@ impl<I: std::fmt::Display + Clone + Send, C: Send> Session<I, C> {
             closed_indicator: Arc::new(Mutex::new(Some(closed_receiver))),
         };
         let session = session_fn(handle.clone());
-        let mut actor = SessionActor::new(
+        let actor = SessionActor::new(
             session,
             session_id,
             to_socket_receiver,
@@ -82,6 +82,7 @@ impl<I: std::fmt::Display + Clone + Send, C: Send> Session<I, C> {
         );
 
         tokio::spawn(async move {
+            // Note: SessionActor::run consumes the actor, guaranteeing it is dropped before the close event is sent.
             let result = actor.run().await;
             closed_sender.send(result).unwrap_or_default();
         });
@@ -172,7 +173,7 @@ impl<I: std::fmt::Display + Clone, C> Session<I, C> {
 }
 
 pub(crate) struct SessionActor<E: SessionExt> {
-    pub extension: E,
+    extension: E,
     id: E::ID,
     to_socket_receiver: mpsc::UnboundedReceiver<InMessage>,
     session_call_receiver: mpsc::UnboundedReceiver<E::Call>,
@@ -196,7 +197,7 @@ impl<E: SessionExt> SessionActor<E> {
         }
     }
 
-    pub(crate) async fn run(&mut self) -> Result<Option<CloseFrame>, Error> {
+    pub(crate) async fn run(mut self) -> Result<Option<CloseFrame>, Error> {
         loop {
             tokio::select! {
                 biased;