diff --git a/src/asio_client_session_impl.cc b/src/asio_client_session_impl.cc
index 28bf0cc5..982dae4d 100644
--- a/src/asio_client_session_impl.cc
+++ b/src/asio_client_session_impl.cc
@@ -69,17 +69,17 @@ void session_impl::start_resolve(const std::string &host,
                                  const std::string &service) {
   deadline_.expires_from_now(connect_timeout_);
 
-  auto self = this->shared_from_this();
+  auto self = shared_from_this();
 
   resolver_.async_resolve({host, service},
-                          [this, self](const boost::system::error_code &ec,
+                          [self](const boost::system::error_code &ec,
                                        tcp::resolver::iterator endpoint_it) {
                             if (ec) {
-                              not_connected(ec);
+                              self->not_connected(ec);
                               return;
                             }
 
-                            start_connect(endpoint_it);
+                            self->start_connect(endpoint_it);
                           });
 
   deadline_.async_wait(std::bind(&session_impl::handle_deadline, self));
@@ -597,38 +597,38 @@ void session_impl::do_read() {
 
   auto self = this->shared_from_this();
 
-  read_socket([this, self](const boost::system::error_code &ec,
+  read_socket([self](const boost::system::error_code &ec,
                            std::size_t bytes_transferred) {
     if (ec) {
-      if (!should_stop()) {
-        call_error_cb(ec);
+      if (!self->should_stop()) {
+        self->call_error_cb(ec);
       }
-      stop();
+      self->stop();
       return;
     }
 
     {
-      callback_guard cg(*this);
+      callback_guard cg(*self);
 
       auto rv =
-          nghttp2_session_mem_recv(session_, rb_.data(), bytes_transferred);
+          nghttp2_session_mem_recv(self->session_, self->rb_.data(), bytes_transferred);
 
       if (rv != static_cast<ssize_t>(bytes_transferred)) {
-        call_error_cb(make_error_code(
+        self->call_error_cb(make_error_code(
             static_cast<nghttp2_error>(rv < 0 ? rv : NGHTTP2_ERR_PROTO)));
-        stop();
+        self->stop();
         return;
       }
     }
 
-    do_write();
+    self->do_write();
 
-    if (should_stop()) {
-      stop();
+    if (self->should_stop()) {
+      self->stop();
       return;
     }
 
-    do_read();
+    self->do_read();
   });
 }
 
@@ -695,17 +695,17 @@ void session_impl::do_write() {
   auto self = this->shared_from_this();
 
   write_socket(
-      [this, self](const boost::system::error_code &ec, std::size_t n) {
+      [self](const boost::system::error_code &ec, std::size_t n) {
         if (ec) {
-          call_error_cb(ec);
-          stop();
+          self->call_error_cb(ec);
+          self->stop();
           return;
         }
 
-        wblen_ = 0;
-        writing_ = false;
+        self->wblen_ = 0;
+        self->writing_ = false;
 
-        do_write();
+        self->do_write();
       });
 }
 
diff --git a/src/asio_client_session_tcp_impl.cc b/src/asio_client_session_tcp_impl.cc
index 398ce767..77aa676e 100644
--- a/src/asio_client_session_tcp_impl.cc
+++ b/src/asio_client_session_tcp_impl.cc
@@ -37,19 +37,20 @@ session_tcp_impl::session_tcp_impl(
 session_tcp_impl::~session_tcp_impl() {}
 
 void session_tcp_impl::start_connect(tcp::resolver::iterator endpoint_it) {
+  auto self = shared_from_this();
   boost::asio::async_connect(socket_, endpoint_it,
-                             [this](const boost::system::error_code &ec,
+                             [self](const boost::system::error_code &ec,
                                     tcp::resolver::iterator endpoint_it) {
-                               if (stopped()) {
+                               if (self->stopped()) {
                                  return;
                                }
 
                                if (ec) {
-                                 not_connected(ec);
+                                 self->not_connected(ec);
                                  return;
                                }
 
-                               connected(endpoint_it);
+                               self->connected(endpoint_it);
                              });
 }
 
diff --git a/src/asio_client_session_tls_impl.cc b/src/asio_client_session_tls_impl.cc
index e37d7b02..60e5a167 100644
--- a/src/asio_client_session_tls_impl.cc
+++ b/src/asio_client_session_tls_impl.cc
@@ -43,37 +43,38 @@ session_tls_impl::session_tls_impl(
 session_tls_impl::~session_tls_impl() {}
 
 void session_tls_impl::start_connect(tcp::resolver::iterator endpoint_it) {
+  auto self = std::static_pointer_cast<session_tls_impl>(shared_from_this());
   boost::asio::async_connect(
-      socket(), endpoint_it, [this](const boost::system::error_code &ec,
+      socket(), endpoint_it, [self](const boost::system::error_code &ec,
                                     tcp::resolver::iterator endpoint_it) {
-        if (stopped()) {
+        if (self->stopped()) {
           return;
         }
 
         if (ec) {
-          not_connected(ec);
+          self->not_connected(ec);
           return;
         }
 
-        socket_.async_handshake(
+		self->socket_.async_handshake(
             boost::asio::ssl::stream_base::client,
-            [this, endpoint_it](const boost::system::error_code &ec) {
-              if (stopped()) {
+            [self, endpoint_it](const boost::system::error_code &ec) {
+              if (self->stopped()) {
                 return;
               }
 
               if (ec) {
-                not_connected(ec);
+                self->not_connected(ec);
                 return;
               }
 
-              if (!tls_h2_negotiated(socket_)) {
-                not_connected(make_error_code(
+              if (!tls_h2_negotiated(self->socket_)) {
+                self->not_connected(make_error_code(
                     NGHTTP2_ASIO_ERR_TLS_NO_APP_PROTO_NEGOTIATED));
                 return;
               }
 
-              connected(endpoint_it);
+              self->connected(endpoint_it);
             });
       });
 }