diff --git a/CHANGELOG.md b/CHANGELOG.md
index e39d1f3..87caa06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ 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/).
 ## Unreleased
+
+## [8.4.0] - 2024-10-01
 ### Added
 - Implemented `server/listiso` and `server/mountiso` endpoints.
 ### Changed
diff --git a/client.go b/client.go
index eccf307..1db626b 100644
--- a/client.go
+++ b/client.go
@@ -11,7 +11,7 @@ import (
 	"strings"
 )
 
-const version = "8.3.1"
+const version = "8.4.0"
 
 type httpClientInterface interface {
 	Do(*http.Request) (*http.Response, error)
diff --git a/client_test.go b/client_test.go
index fb4930e..a607359 100644
--- a/client_test.go
+++ b/client_test.go
@@ -33,7 +33,7 @@ func TestRequestHasCorrectHeaders(t *testing.T) {
 	assert.NoError(t, err)
 
 	assert.Equal(t, "application/json", request.Header.Get("Content-Type"), "header Content-Type is correct")
-	assert.Equal(t, "test-application/0.0.1 glesys-go/8.3.1", request.Header.Get("User-Agent"), "header User-Agent is correct")
+	assert.Equal(t, "test-application/0.0.1 glesys-go/8.4.0", request.Header.Get("User-Agent"), "header User-Agent is correct")
 
 	assert.NotEmpty(t, request.Header.Get("Authorization"), "header Authorization is not empty")
 }
@@ -43,7 +43,7 @@ func TestEmptyUserAgent(t *testing.T) {
 
 	request, err := client.newRequest(context.Background(), "GET", "/", nil)
 	assert.NoError(t, err)
-	assert.Equal(t, "glesys-go/8.3.1", request.Header.Get("User-Agent"), "header User-Agent is correct")
+	assert.Equal(t, "glesys-go/8.4.0", request.Header.Get("User-Agent"), "header User-Agent is correct")
 }
 
 func TestGetResponseErrorMessage(t *testing.T) {