diff --git a/mockserver-client/src/main/groovy/pl/touk/mockserver/client/Util.groovy b/mockserver-client/src/main/groovy/pl/touk/mockserver/client/Util.groovy
index 1194202..8cffc3b 100644
--- a/mockserver-client/src/main/groovy/pl/touk/mockserver/client/Util.groovy
+++ b/mockserver-client/src/main/groovy/pl/touk/mockserver/client/Util.groovy
@@ -13,7 +13,7 @@ import org.apache.http.util.EntityUtils
 class Util {
     static GPathResult extractXmlResponse(CloseableHttpResponse response) {
         HttpEntity entity = response.entity
-        GPathResult xml = new XmlSlurper().parseText(EntityUtils.toString(entity))
+        GPathResult xml = new XmlSlurper().parseText(EntityUtils.toString(entity, 'UTF-8'))
         EntityUtils.consumeQuietly(entity)
         return xml
     }
@@ -27,7 +27,7 @@ class Util {
 
     static Object extractJsonResponse(CloseableHttpResponse response) {
         HttpEntity entity = response.entity
-        Object json = new JsonSlurper().parseText(EntityUtils.toString(entity))
+        Object json = new JsonSlurper().parseText(EntityUtils.toString(entity, 'UTF-8'))
         EntityUtils.consumeQuietly(entity)
         return json
     }
diff --git a/mockserver-tests/src/test/groovy/pl/touk/mockserver/tests/MockServerIntegrationTest.groovy b/mockserver-tests/src/test/groovy/pl/touk/mockserver/tests/MockServerIntegrationTest.groovy
index 819e35d..435d43d 100644
--- a/mockserver-tests/src/test/groovy/pl/touk/mockserver/tests/MockServerIntegrationTest.groovy
+++ b/mockserver-tests/src/test/groovy/pl/touk/mockserver/tests/MockServerIntegrationTest.groovy
@@ -1,13 +1,29 @@
 package pl.touk.mockserver.tests
 
 import groovy.util.slurpersupport.GPathResult
-import org.apache.http.client.methods.*
+import org.apache.http.client.methods.CloseableHttpResponse
+import org.apache.http.client.methods.HttpDelete
+import org.apache.http.client.methods.HttpGet
+import org.apache.http.client.methods.HttpHead
+import org.apache.http.client.methods.HttpOptions
+import org.apache.http.client.methods.HttpPatch
+import org.apache.http.client.methods.HttpPost
+import org.apache.http.client.methods.HttpPut
+import org.apache.http.client.methods.HttpTrace
 import org.apache.http.entity.ContentType
 import org.apache.http.entity.StringEntity
 import org.apache.http.impl.client.CloseableHttpClient
 import org.apache.http.impl.client.HttpClients
 import org.apache.http.util.EntityUtils
-import pl.touk.mockserver.client.*
+import pl.touk.mockserver.client.AddMockRequestData
+import pl.touk.mockserver.client.InvalidMockDefinition
+import pl.touk.mockserver.client.Method
+import pl.touk.mockserver.client.MockAlreadyExists
+import pl.touk.mockserver.client.MockDoesNotExist
+import pl.touk.mockserver.client.MockEvent
+import pl.touk.mockserver.client.RegisteredMock
+import pl.touk.mockserver.client.RemoteMockServer
+import pl.touk.mockserver.client.Util
 import pl.touk.mockserver.server.HttpMockServer
 import spock.lang.Shared
 import spock.lang.Specification
@@ -52,6 +68,28 @@ class MockServerIntegrationTest extends Specification {
             remoteMockServer.removeMock('testRest')?.size() == 1
     }
 
+    def "should add working rest mock on endpoint with utf"() {
+        expect:
+            remoteMockServer.addMock(new AddMockRequestData(
+                    name: 'testRestUtf',
+                    path: 'testEndpoint',
+                    port: 9999,
+                    predicate: '''{req -> req.xml.name() == 'request' && req.xml.@test == 'łżźćąś'}''',
+                    response: '''{req -> "<goodResponseRest-${req.xml.name()} ans='łżźćąś'/>"}''',
+                    soap: false
+            ))
+        when:
+            HttpPost restPost = new HttpPost('http://localhost:9999/testEndpoint')
+            restPost.entity = new StringEntity('<request test="łżźćąś"/>', ContentType.create("text/xml", "UTF-8"))
+            CloseableHttpResponse response = client.execute(restPost)
+        then:
+            GPathResult restPostResponse = Util.extractXmlResponse(response)
+            restPostResponse.name() == 'goodResponseRest-request'
+            restPostResponse.@ans == 'łżźćąś'
+        expect:
+            remoteMockServer.removeMock('testRestUtf')?.size() == 1
+    }
+
     def "should add soap mock on endpoint"() {
         expect:
             remoteMockServer.addMock(new AddMockRequestData(
diff --git a/mockserver/src/main/groovy/pl/touk/mockserver/server/Util.groovy b/mockserver/src/main/groovy/pl/touk/mockserver/server/Util.groovy
index 53a0751..93ab7a5 100644
--- a/mockserver/src/main/groovy/pl/touk/mockserver/server/Util.groovy
+++ b/mockserver/src/main/groovy/pl/touk/mockserver/server/Util.groovy
@@ -4,9 +4,10 @@ import com.sun.net.httpserver.HttpExchange
 
 class Util {
     static void createResponse(HttpExchange ex, String response, int statusCode) {
-        ex.sendResponseHeaders(statusCode, response ? response.length() : -1)
+        byte[] responseBytes = response ? response.getBytes('UTF-8') : new byte[0]
+        ex.sendResponseHeaders(statusCode, responseBytes.length ?: -1)
         if (response) {
-            ex.responseBody << response
+            ex.responseBody << responseBytes
             ex.responseBody.close()
         }
     }