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/docs/src/test/resources/docs/security/RememberMeSecurityConfigurationXmlTests-context.xml b/docs/src/test/resources/docs/security/RememberMeSecurityConfigurationXmlTests-context.xml
index 3459baf7..1996c58f 100644
--- a/docs/src/test/resources/docs/security/RememberMeSecurityConfigurationXmlTests-context.xml
+++ b/docs/src/test/resources/docs/security/RememberMeSecurityConfigurationXmlTests-context.xml
@@ -3,8 +3,8 @@
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xmlns:security="http://www.springframework.org/schema/security"
 	xmlns:p="http://www.springframework.org/schema/p"
-	xsi:schemaLocation="http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd
-		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/security https://www.springframework.org/schema/security/spring-security.xsd
+		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">
 
 	<!-- tag::config[] -->
 	<security:http>
diff --git a/docs/src/test/resources/docs/security/security-config.xml b/docs/src/test/resources/docs/security/security-config.xml
index 4db11718..42a5a4a3 100644
--- a/docs/src/test/resources/docs/security/security-config.xml
+++ b/docs/src/test/resources/docs/security/security-config.xml
@@ -2,8 +2,8 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	   xmlns:security="http://www.springframework.org/schema/security"
-	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-						   http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd">
+	   xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+						   http://www.springframework.org/schema/security https://www.springframework.org/schema/security/spring-security.xsd">
 
 	<!-- tag::config[] -->
 	<security:http>
diff --git a/etc/checkstyle/checkstyle.xml b/etc/checkstyle/checkstyle.xml
index c130b763..9d7e54fe 100644
--- a/etc/checkstyle/checkstyle.xml
+++ b/etc/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">
 	<!-- Supressions -->
 	<module name="SuppressionFilter">
diff --git a/etc/checkstyle/suppressions.xml b/etc/checkstyle/suppressions.xml
index 305c7f83..28fbee48 100644
--- a/etc/checkstyle/suppressions.xml
+++ b/etc/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>
 	<!-- global -->
 	<suppress files="[\\/]src[\\/]integration-test[\\/]java[\\/]" checks="Javadoc*"/>
diff --git a/samples/xml/jdbc/src/main/webapp/WEB-INF/spring/session.xml b/samples/xml/jdbc/src/main/webapp/WEB-INF/spring/session.xml
index 35f6d431..e60b7ac3 100644
--- a/samples/xml/jdbc/src/main/webapp/WEB-INF/spring/session.xml
+++ b/samples/xml/jdbc/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/xml/jdbc/src/main/webapp/WEB-INF/web.xml b/samples/xml/jdbc/src/main/webapp/WEB-INF/web.xml
index 78e69235..9d693fbc 100644
--- a/samples/xml/jdbc/src/main/webapp/WEB-INF/web.xml
+++ b/samples/xml/jdbc/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/xml/redis/src/main/webapp/WEB-INF/spring/session.xml b/samples/xml/redis/src/main/webapp/WEB-INF/spring/session.xml
index 62f9b246..520b862c 100644
--- a/samples/xml/redis/src/main/webapp/WEB-INF/spring/session.xml
+++ b/samples/xml/redis/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/xml/redis/src/main/webapp/WEB-INF/web.xml b/samples/xml/redis/src/main/webapp/WEB-INF/web.xml
index fd09adf2..dfe804f9 100644
--- a/samples/xml/redis/src/main/webapp/WEB-INF/web.xml
+++ b/samples/xml/redis/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-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml b/spring-session-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml
index 873638de..f60708c6 100644
--- a/spring-session-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationClassPathXmlApplicationContextTests-context.xml
+++ b/spring-session-data-redis/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-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml b/spring-session-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml
index 93382ab1..8a3d6aa5 100644
--- a/spring-session-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlCustomExpireTests-context.xml
+++ b/spring-session-data-redis/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-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml b/spring-session-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml
index 0641c518..258d33fa 100644
--- a/spring-session-data-redis/src/test/resources/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationXmlTests-context.xml
+++ b/spring-session-data-redis/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/>
 
diff --git a/spring-session-hazelcast/src/integration-test/resources/hazelcast-server.xml b/spring-session-hazelcast/src/integration-test/resources/hazelcast-server.xml
index 089b0227..e3ec2d49 100644
--- a/spring-session-hazelcast/src/integration-test/resources/hazelcast-server.xml
+++ b/spring-session-hazelcast/src/integration-test/resources/hazelcast-server.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <hazelcast xmlns="http://www.hazelcast.com/schema/config"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://www.hazelcast.com/schema/config http://www.hazelcast.com/schema/config/hazelcast-config-3.11.xsd">
+		xsi:schemaLocation="http://www.hazelcast.com/schema/config https://www.hazelcast.com/schema/config/hazelcast-config-3.11.xsd">
 
 	<user-code-deployment enabled="true">
 		<class-cache-mode>ETERNAL</class-cache-mode>
diff --git a/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-idle-time-map-name.xml b/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-idle-time-map-name.xml
index 43566450..9b94eb27 100644
--- a/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-idle-time-map-name.xml
+++ b/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-idle-time-map-name.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <hazelcast xmlns="http://www.hazelcast.com/schema/config"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://www.hazelcast.com/schema/config http://www.hazelcast.com/schema/config/hazelcast-config-3.11.xsd">
+		xsi:schemaLocation="http://www.hazelcast.com/schema/config https://www.hazelcast.com/schema/config/hazelcast-config-3.11.xsd">
 
 	<group>
 		<name>spring-session-it-test-idle-time-map-name</name>
diff --git a/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-map-name.xml b/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-map-name.xml
index 7c5d1e0e..df65e2c8 100644
--- a/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-map-name.xml
+++ b/spring-session-hazelcast/src/integration-test/resources/org/springframework/session/hazelcast/config/annotation/web/http/hazelcast-custom-map-name.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <hazelcast xmlns="http://www.hazelcast.com/schema/config"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		xsi:schemaLocation="http://www.hazelcast.com/schema/config http://www.hazelcast.com/schema/config/hazelcast-config-3.11.xsd">
+		xsi:schemaLocation="http://www.hazelcast.com/schema/config https://www.hazelcast.com/schema/config/hazelcast-config-3.11.xsd">
 
 	<group>
 		<name>spring-session-it-test-map-name</name>