diff --git a/.github/workflows/go_ci_lint.yml b/.github/workflows/go_ci_lint.yml
index 2d5211c..9b1ad53 100644
--- a/.github/workflows/go_ci_lint.yml
+++ b/.github/workflows/go_ci_lint.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
diff --git a/.github/workflows/go_mod_check.yml b/.github/workflows/go_mod_check.yml
index 2109152..8530fdb 100644
--- a/.github/workflows/go_mod_check.yml
+++ b/.github/workflows/go_mod_check.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - name: Run Go Mod Check Action
         uses: Shoothzj/go-mod-check-action@main
         with:
diff --git a/.github/workflows/go_unit_test.yml b/.github/workflows/go_unit_test.yml
index b31e5a8..aeb105e 100644
--- a/.github/workflows/go_unit_test.yml
+++ b/.github/workflows/go_unit_test.yml
@@ -15,6 +15,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - name: Run coverage
         run: go test ./... -coverpkg=./opcua/... -race -coverprofile=coverage.out -covermode=atomic
diff --git a/go.mod b/go.mod
index d41d48b..692723c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module opcua-go
 
-go 1.20
+go 1.21
 
 require github.com/stretchr/testify v1.9.0
 
diff --git a/opcua/client.go b/opcua/client.go
index f71e3f1..61240a9 100644
--- a/opcua/client.go
+++ b/opcua/client.go
@@ -1,12 +1,18 @@
 package opcua
 
+import "log/slog"
+
 type ClientConfig struct {
+	logger *slog.Logger
 }
 
 type Client struct {
+	logger *slog.Logger
 }
 
 func NewClient(config *ClientConfig) *Client {
-	client := &Client{}
+	client := &Client{
+		logger: config.logger,
+	}
 	return client
 }
diff --git a/opcua/server.go b/opcua/server.go
index dd20d49..cd99d5b 100644
--- a/opcua/server.go
+++ b/opcua/server.go
@@ -2,6 +2,7 @@ package opcua
 
 import (
 	"fmt"
+	"log/slog"
 	"net"
 	"sync"
 )
@@ -9,6 +10,8 @@ import (
 type ServerConfig struct {
 	Host string
 	Port int
+
+	logger *slog.Logger
 }
 
 func (s *ServerConfig) addr() string {
@@ -19,6 +22,8 @@ type Server struct {
 	config   *ServerConfig
 	listener net.Listener
 
+	logger *slog.Logger
+
 	mutex sync.RWMutex
 	quit  chan bool
 }
@@ -27,7 +32,9 @@ func NewServer(config *ServerConfig) *Server {
 	server := &Server{
 		config: config,
 		quit:   make(chan bool),
+		logger: config.logger,
 	}
+	server.logger.Info("server initialized", slog.String("host", config.Host), slog.Int("port", config.Port))
 	return server
 }
 
@@ -91,6 +98,7 @@ func (s *Server) Close() error {
 	err := s.listener.Close()
 	s.listener = nil
 	if err == nil {
+		s.logger.Info("server closed successfully")
 		return nil
 	}
 	return fmt.Errorf("failed to close listener: %w", err)
diff --git a/opcua/server_test.go b/opcua/server_test.go
index d6a762e..2e74862 100644
--- a/opcua/server_test.go
+++ b/opcua/server_test.go
@@ -3,13 +3,15 @@ package opcua
 import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"log/slog"
 	"testing"
 )
 
 func TestStartWithZeroPort(t *testing.T) {
 	config := &ServerConfig{
-		Host: "localhost",
-		Port: 0,
+		Host:   "localhost",
+		Port:   0,
+		logger: slog.Default(),
 	}
 
 	server := NewServer(config)