diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
index f1fe11de9..687cf648f 100644
--- a/benchmarks/pom.xml
+++ b/benchmarks/pom.xml
@@ -14,7 +14,7 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/docs/pom.xml b/docs/pom.xml
index ad685a84e..da44db2aa 100644
--- a/docs/pom.xml
+++ b/docs/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/pom.xml b/pom.xml
index a0297a77d..98eb79ca2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-core/pom.xml b/spring-cloud-sleuth-core/pom.xml
index 3caf750ef..258e4705c 100644
--- a/spring-cloud-sleuth-core/pom.xml
+++ b/spring-cloud-sleuth-core/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/client/integration/WebClientTests.java b/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/client/integration/WebClientTests.java
index 0d09f8617..5deba1e38 100644
--- a/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/client/integration/WebClientTests.java
+++ b/spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/instrument/web/client/integration/WebClientTests.java
@@ -265,7 +265,7 @@ public class WebClientTests {
 		try (Tracer.SpanInScope ws = this.tracer.withSpanInScope(span)) {
 			ResponseEntity<String> response = provider.get(this);
 
-			// http://github.com/spring-cloud/spring-cloud-sleuth/issues/327
+			// https://github.com/spring-cloud/spring-cloud-sleuth/issues/327
 			// we don't want to respond with any tracing data
 			then(getHeader(response, SAMPLED_NAME)).isNull();
 			then(getHeader(response, TRACE_ID_NAME)).isNull();
diff --git a/spring-cloud-sleuth-core/src/test/resources/beans/applicationContext.xml b/spring-cloud-sleuth-core/src/test/resources/beans/applicationContext.xml
index 30df663a8..d7cdd3d19 100644
--- a/spring-cloud-sleuth-core/src/test/resources/beans/applicationContext.xml
+++ b/spring-cloud-sleuth-core/src/test/resources/beans/applicationContext.xml
@@ -22,7 +22,7 @@
 	   xsi:schemaLocation="http://www.springframework.org/schema/beans
 	    https://www.springframework.org/schema/beans/spring-beans.xsd
 	    http://www.springframework.org/schema/integration
-		http://www.springframework.org/schema/integration/spring-integration.xsd
+		https://www.springframework.org/schema/integration/spring-integration.xsd
 		http://www.springframework.org/schema/task https://www.springframework.org/schema/task/spring-task.xsd">
 
 	<int:channel id="messagingChannel"/>
diff --git a/spring-cloud-sleuth-dependencies/pom.xml b/spring-cloud-sleuth-dependencies/pom.xml
index 05eda32ba..78af0f721 100644
--- a/spring-cloud-sleuth-dependencies/pom.xml
+++ b/spring-cloud-sleuth-dependencies/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/pom.xml b/spring-cloud-sleuth-samples/pom.xml
index f75733352..8b5e55a98 100644
--- a/spring-cloud-sleuth-samples/pom.xml
+++ b/spring-cloud-sleuth-samples/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-feign/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-feign/pom.xml
index 4872b542b..ab2b188c8 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-feign/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-feign/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-messaging/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-messaging/pom.xml
index 07bd0a481..703b071f1 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-messaging/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-messaging/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-ribbon/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-ribbon/pom.xml
index d165de8b1..def1baa0a 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-ribbon/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-ribbon/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-test-core/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-test-core/pom.xml
index 583bfc974..ec7719482 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-test-core/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-test-core/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/pom.xml
index f1930915e..0dccb78f8 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/src/main/resources/static/sockjs-0.3.4.js b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/src/main/resources/static/sockjs-0.3.4.js
index 0939dbfe4..89d778a7f 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/src/main/resources/static/sockjs-0.3.4.js
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-websocket/src/main/resources/static/sockjs-0.3.4.js
@@ -1048,7 +1048,7 @@ SockJS = (function () {
 
 
 // References:
-//   http://ajaxian.com/archives/100-line-ajax-wrapper
+//   https://ajaxian.com/archives/100-line-ajax-wrapper
 //   https://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx
     var XDRObject = utils.XDRObject = function (method, url, payload) {
         var that = this;
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-zipkin/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-zipkin/pom.xml
index bcc9f7c4a..325134f30 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-zipkin/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample-zipkin/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample/pom.xml b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample/pom.xml
index 9ca8144f9..bc3fb4cc1 100644
--- a/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample/pom.xml
+++ b/spring-cloud-sleuth-samples/spring-cloud-sleuth-sample/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-sleuth-zipkin/pom.xml b/spring-cloud-sleuth-zipkin/pom.xml
index 60e561863..537f2335e 100644
--- a/spring-cloud-sleuth-zipkin/pom.xml
+++ b/spring-cloud-sleuth-zipkin/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-starter-sleuth/pom.xml b/spring-cloud-starter-sleuth/pom.xml
index 8898f2957..bb2b2b200 100644
--- a/spring-cloud-starter-sleuth/pom.xml
+++ b/spring-cloud-starter-sleuth/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-starter-zipkin/pom.xml b/spring-cloud-starter-zipkin/pom.xml
index 875f441b7..41516a65c 100644
--- a/spring-cloud-starter-zipkin/pom.xml
+++ b/spring-cloud-starter-zipkin/pom.xml
@@ -15,7 +15,7 @@
   ~ limitations under the License.
   -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>