1 files changed, 5 insertions, 3 deletions
diff --git a/src/main/java/com/it_jaros/jscanner/ServiceDetector.java b/src/main/java/com/it_jaros/jscanner/ServiceDetector.java
index 425372c..4d4f76e 100644
--- a/src/main/java/com/it_jaros/jscanner/ServiceDetector.java
+++ b/src/main/java/com/it_jaros/jscanner/ServiceDetector.java
@@ -1,5 +1,6 @@
 package com.it_jaros.jscanner;
 
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.regex.Pattern;
 
@@ -20,13 +21,14 @@ public class ServiceDetector {
             new ServicePattern(ServiceType.SSH, Pattern.compile("(?i)^SSH-"))
     );
 
-    public static ServiceType detect(String banner) {
-        if (banner == null || banner.isBlank()) {
+    public static ServiceType detect(byte[] banner) {
+        if (banner == null || banner.length == 0) {
             return ServiceType.UNKNOWN;
         }
 
+        String bannerString =  new String(banner, StandardCharsets.UTF_8);
         for (ServicePattern servicePattern : patterns) {
-            if (servicePattern.matches(banner)) {
+            if (servicePattern.matches(bannerString)) {
                 return servicePattern.serviceType();
             }
         }