diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index 27b3f602..da15c8d4 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
-		"http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+		"https://www.puppycrawl.com/dtds/configuration_1_3.dtd">
 <module name="Checker">
 	<!-- Suppressions -->
 	<module name="SuppressionFilter">
diff --git a/config/checkstyle/suppressions.xml b/config/checkstyle/suppressions.xml
index 915c20fb..cf19e974 100644
--- a/config/checkstyle/suppressions.xml
+++ b/config/checkstyle/suppressions.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE suppressions PUBLIC "-//Puppy Crawl//DTD Suppressions 1.1//EN"
-		"http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+		"https://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
 <suppressions>
 	<suppress files=".+Application\.java" checks="HideUtilityClassConstructor"/>
 	<suppress files=".+Configuration\.java" checks="HideUtilityClassConstructor"/>
diff --git a/docs/src/test/resources/docs/HttpSessionConfigurationNoOpConfigureRedisActionXmlTests-context.xml b/docs/src/test/resources/docs/HttpSessionConfigurationNoOpConfigureRedisActionXmlTests-context.xml
index 8b4410bd..631a86dd 100644
--- a/docs/src/test/resources/docs/HttpSessionConfigurationNoOpConfigureRedisActionXmlTests-context.xml
+++ b/docs/src/test/resources/docs/HttpSessionConfigurationNoOpConfigureRedisActionXmlTests-context.xml
@@ -4,9 +4,9 @@
 	xmlns:context="http://www.springframework.org/schema/context"
 	xmlns:p="http://www.springframework.org/schema/p"
 	xmlns:util="http://www.springframework.org/schema/util"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
+		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util-4.1.xsd">
 
 	<context:annotation-config/>
 
diff --git a/docs/src/test/resources/docs/http/HttpSessionListenerXmlTests-context.xml b/docs/src/test/resources/docs/http/HttpSessionListenerXmlTests-context.xml
index 404d424b..aafcaa6e 100644
--- a/docs/src/test/resources/docs/http/HttpSessionListenerXmlTests-context.xml
+++ b/docs/src/test/resources/docs/http/HttpSessionListenerXmlTests-context.xml
@@ -4,9 +4,9 @@
 	xmlns:context="http://www.springframework.org/schema/context"
 	xmlns:p="http://www.springframework.org/schema/p"
 	xmlns:util="http://www.springframework.org/schema/util"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
+		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util-4.1.xsd">
 
 	<!-- tag::config[] -->
 	<bean class="org.springframework.security.web.session.HttpSessionEventPublisher"/>
diff --git a/samples/httpsession-gemfire-clientserver-xml/src/main/resources/META-INF/spring/session-server.xml b/samples/httpsession-gemfire-clientserver-xml/src/main/resources/META-INF/spring/session-server.xml
index a160945b..3f618c80 100644
--- a/samples/httpsession-gemfire-clientserver-xml/src/main/resources/META-INF/spring/session-server.xml
+++ b/samples/httpsession-gemfire-clientserver-xml/src/main/resources/META-INF/spring/session-server.xml
@@ -6,10 +6,10 @@
 	   xmlns:util="http://www.springframework.org/schema/util"
 	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	   xsi:schemaLocation="
-	   	http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-        http://www.springframework.org/schema/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
-		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
+	   	http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
+        http://www.springframework.org/schema/gemfire https://www.springframework.org/schema/gemfire/spring-gemfire.xsd
+		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd
 ">
 
 	<!-- tag::beans[] -->
diff --git a/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/spring/session-client.xml b/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/spring/session-client.xml
index 46818823..2a3e17fe 100644
--- a/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/spring/session-client.xml
+++ b/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/spring/session-client.xml
@@ -6,10 +6,10 @@
 	   xmlns:util="http://www.springframework.org/schema/util"
 	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	   xsi:schemaLocation="
-	   	http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-        http://www.springframework.org/schema/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
-		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
+	   	http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
+        http://www.springframework.org/schema/gemfire https://www.springframework.org/schema/gemfire/spring-gemfire.xsd
+		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd
 ">
 
 	<!-- tag::beans[] -->
diff --git a/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/web.xml b/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/web.xml
index d30dc3ee..00bda375 100644
--- a/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/web.xml
+++ b/samples/httpsession-gemfire-clientserver-xml/src/main/webapp/WEB-INF/web.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
+		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
 	<!--
 	- Location of the XML file that defines the root application context
 	- Applied by ContextLoaderListener.
diff --git a/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/spring/session.xml b/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/spring/session.xml
index 2e408ab0..fa9d28af 100644
--- a/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/spring/session.xml
+++ b/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/spring/session.xml
@@ -5,10 +5,10 @@
 	   xmlns:util="http://www.springframework.org/schema/util"
 	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	   xsi:schemaLocation="
-	   	http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-        http://www.springframework.org/schema/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
-		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
+	   	http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
+        http://www.springframework.org/schema/gemfire https://www.springframework.org/schema/gemfire/spring-gemfire.xsd
+		http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd
 ">
 
 	<!-- tag::beans[] -->
diff --git a/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/web.xml b/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/web.xml
index 9f311560..61c76ce8 100644
--- a/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/web.xml
+++ b/samples/httpsession-gemfire-p2p-xml/src/main/webapp/WEB-INF/web.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
+		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
 	<!--
 	- Location of the XML file that defines the root application context
 	- Applied by ContextLoaderListener.
diff --git a/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml b/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml
index 35f6d431..e60b7ac3 100644
--- a/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml
+++ b/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/spring/session.xml
@@ -3,9 +3,9 @@
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:context="http://www.springframework.org/schema/context"
 	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd
+		http://www.springframework.org/schema/jdbc https://www.springframework.org/schema/jdbc/spring-jdbc.xsd">
 
 	<!-- tag::beans[] -->
 
diff --git a/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/web.xml b/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/web.xml
index cefde153..db702fe0 100644
--- a/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/web.xml
+++ b/samples/httpsession-jdbc-xml/src/main/webapp/WEB-INF/web.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
+		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
 	<!--
 	- Location of the XML file that defines the root application context
 	- Applied by ContextLoaderListener.
diff --git a/samples/httpsession-xml/src/main/webapp/WEB-INF/spring/session.xml b/samples/httpsession-xml/src/main/webapp/WEB-INF/spring/session.xml
index 46b27fe3..3cfeb31b 100644
--- a/samples/httpsession-xml/src/main/webapp/WEB-INF/spring/session.xml
+++ b/samples/httpsession-xml/src/main/webapp/WEB-INF/spring/session.xml
@@ -3,8 +3,8 @@
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:context="http://www.springframework.org/schema/context"
 	xmlns:p="http://www.springframework.org/schema/p"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 
 	<!-- tag::beans[] -->
 
diff --git a/samples/httpsession-xml/src/main/webapp/WEB-INF/web.xml b/samples/httpsession-xml/src/main/webapp/WEB-INF/web.xml
index 26f9383b..96cd4445 100644
--- a/samples/httpsession-xml/src/main/webapp/WEB-INF/web.xml
+++ b/samples/httpsession-xml/src/main/webapp/WEB-INF/web.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
+		xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
 	<!--
 	- Location of the XML file that defines the root application context
 	- Applied by ContextLoaderListener.
diff --git a/spring-session/src/test/resources/org/springframework/session/data/gemfire/config/annotation/web/http/GemFireHttpSessionXmlConfigurationTests-context.xml b/spring-session/src/test/resources/org/springframework/session/data/gemfire/config/annotation/web/http/GemFireHttpSessionXmlConfigurationTests-context.xml
index 82818bbf..e302dab2 100644
--- a/spring-session/src/test/resources/org/springframework/session/data/gemfire/config/annotation/web/http/GemFireHttpSessionXmlConfigurationTests-context.xml
+++ b/spring-session/src/test/resources/org/springframework/session/data/gemfire/config/annotation/web/http/GemFireHttpSessionXmlConfigurationTests-context.xml
@@ -5,9 +5,9 @@
 	   xmlns:util="http://www.springframework.org/schema/util"
 	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	   xsi:schemaLocation="
-	   	http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-        http://www.springframework.org/schema/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
-        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
+	   	http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+        http://www.springframework.org/schema/gemfire https://www.springframework.org/schema/gemfire/spring-gemfire.xsd
+        http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd
 ">
 
 	<util:properties id="gemfireProperties">
diff --git a/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml b/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml
index 873638de..f60708c6 100644
--- a/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml
+++ b/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml
@@ -2,8 +2,8 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:context="http://www.springframework.org/schema/context"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+	http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 
 	<context:annotation-config/>
 
diff --git a/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml b/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml
index 93382ab1..8a3d6aa5 100644
--- a/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml
+++ b/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml
@@ -3,8 +3,8 @@
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:context="http://www.springframework.org/schema/context"
 	xmlns:p="http://www.springframework.org/schema/p"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 
 	<context:annotation-config/>
 
diff --git a/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml b/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml
index 0641c518..258d33fa 100644
--- a/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml
+++ b/spring-session/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml
@@ -2,8 +2,8 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:context="http://www.springframework.org/schema/context"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+	http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 
 	<context:annotation-config/>