diff --git a/wbmalert.go b/wbmalert.go
index e948adc..e41d9a2 100644
--- a/wbmalert.go
+++ b/wbmalert.go
@@ -1,8 +1,9 @@
 package main
 
 import (
+	"fmt"
 	"io"
-	"log"
+	"log/slog"
 	"net/http"
 	"strings"
 	"sync"
@@ -66,26 +67,30 @@ func createInitialSnapshot(website *website, wg *sync.WaitGroup) {
 	content, err := getWebsiteAsString(website)
 	if err == nil {
 		website.Snapshot = content
-		log.Println("Created initial snapshot for " + website.Name)
+		slog.Info("Created initial snapshot for", "website", website.Name)
 	} else {
-		log.Println(err)
+		slog.Error("Can't create snapshot for", "website", website.Name, "error", err)
 	}
 	defer wg.Done()
 }
 
 func getWebsiteAsString(website *website) (string, error) {
 	request, err := http.NewRequest(http.MethodGet, website.Url, nil)
+	errorText := fmt.Sprintf("Error fetching %s", website.Name)
 	if err != nil {
-		return "Error", err
+		return errorText, err
 	}
 	resp, err := client.Do(request)
 	if err != nil {
-		return "Error", err
+		return errorText, err
+	}
+	if resp.StatusCode >= 400 {
+		return errorText, fmt.Errorf("http status code error occured : %d", resp.StatusCode)
 	}
 	defer resp.Body.Close()
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return "Error", err
+		return errorText, err
 	}
 	content := string(body[:])
 	content = removeByRegexp(content, website.RegexpRemove)
@@ -102,22 +107,22 @@ func checkWebsite(website *website, wg *sync.WaitGroup) {
 			printContentChangeMsg(website)
 			playSound()
 		} else {
-			log.Println("No changes for " + website.Name)
+			slog.Info("No changes for", "website", website.Name)
 		}
 	} else {
-		log.Println(err)
+		slog.Error("website", website.Name, "error", err)
 	}
 
 	defer wg.Done()
 }
 
 func printContentChangeMsg(website *website) {
-	log.Println("========= " + website.Name + " =========")
-	log.Println("Content changed: " + website.Url)
-	log.Println("====================" + strings.Repeat("=", len(website.Name)))
+	slog.Info("========= " + website.Name + " =========")
+	slog.Info("Content changed: " + website.Url)
+	slog.Info("====================" + strings.Repeat("=", len(website.Name)))
 }
 
 func goToSleep() {
-	log.Printf("Going to sleep for %d seconds", interval)
+	slog.Info("Going to sleep for", "seconds", interval)
 	time.Sleep(time.Duration(interval) * time.Second)
 }
diff --git a/wbmalert_test.go b/wbmalert_test.go
index 83937da..bd5e4a7 100644
--- a/wbmalert_test.go
+++ b/wbmalert_test.go
@@ -20,7 +20,8 @@ func (m *mockClient) Do(req *http.Request) (*http.Response, error) {
 	reader := strings.NewReader(HTTP_GET_BODY)
 	readCloser := io.NopCloser(reader)
 	response := http.Response{
-		Body: readCloser,
+		Body:       readCloser,
+		StatusCode: 200,
 	}
 	return &response, nil
 }