diff --git a/index.html b/index.html
index e60ea9a1e9..61f9f59e50 100644
--- a/index.html
+++ b/index.html
@@ -133,12 +133,12 @@ public interface TempConverter {
 
 <int:chain id="wsChain" input-channel="viaWebService">
 	<int:transformer
-	   expression="'&lt;FahrenheitToCelsius xmlns=''http://www.w3schools.com/xml/''&gt;&lt;Fahrenheit&gt;XXX&lt;/Fahrenheit&gt;&lt;/FahrenheitToCelsius&gt;'.replace('XXX', payload.toString())" />
+	   expression="'&lt;FahrenheitToCelsius xmlns=''https://www.w3schools.com/xml/''&gt;&lt;Fahrenheit&gt;XXX&lt;/Fahrenheit&gt;&lt;/FahrenheitToCelsius&gt;'.replace('XXX', payload.toString())" />
 	<int-ws:header-enricher>
-		<int-ws:soap-action value="http://www.w3schools.com/xml/FahrenheitToCelsius"/>
+		<int-ws:soap-action value="https://www.w3schools.com/xml/FahrenheitToCelsius"/>
 	</int-ws:header-enricher>
 	<int-ws:outbound-gateway
-		uri="http://www.w3schools.com/xml/tempconvert.asmx"/>
+		uri="https://www.w3schools.com/xml/tempconvert.asmx"/>
 	<int-xml:xpath-transformer
 		xpath-expression="/*[local-name()='FahrenheitToCelsiusResponse']/*[local-name()='FahrenheitToCelsiusResult']"/>
 </int:chain>
@@ -171,14 +171,14 @@ public class Application {
   public IntegrationFlow convert() {
       return f -> f
         .transform(payload ->
-              "<FahrenheitToCelsius xmlns=\"http://www.w3schools.com/xml/\">"
+              "<FahrenheitToCelsius xmlns=\"https://www.w3schools.com/xml/\">"
             +     "<Fahrenheit>" + payload + "</Fahrenheit>"
             + "</FahrenheitToCelsius>")
         .enrichHeaders(h -> h
             .header(WebServiceHeaders.SOAP_ACTION,
-                "http://www.w3schools.com/xml/FahrenheitToCelsius"))
+                "https://www.w3schools.com/xml/FahrenheitToCelsius"))
         .handle(new SimpleWebServiceOutboundGateway(
-            "http://www.w3schools.com/xml/tempconvert.asmx"))
+            "https://www.w3schools.com/xml/tempconvert.asmx"))
         .transform(Transformers.xpath("/*[local-name()=\"FahrenheitToCelsiusResponse\"]"
             + "/*[local-name()=\"FahrenheitToCelsiusResult\"]"));
   }