diff --git a/1.1.x/spring-cloud-cloudfoundry.xml b/1.1.x/spring-cloud-cloudfoundry.xml
index 76a5cc5..16f1863 100644
--- a/1.1.x/spring-cloud-cloudfoundry.xml
+++ b/1.1.x/spring-cloud-cloudfoundry.xml
@@ -65,7 +65,7 @@ are configured, they default per the user&#8217;s profile in Cloud Foundry.</sim
 <note>
 <simpara>All of the OAuth2 SSO and resource server features moved to Spring Boot
 in version 1.3. You can find documentation in the
-<link xl:href="http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
+<link xl:href="https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
 </note>
 <simpara>This project provides automatic binding from CloudFoundry service
 credentials to the Spring Boot features. If you have a CloudFoundry
diff --git a/2.0.x/spring-cloud-cloudfoundry.xml b/2.0.x/spring-cloud-cloudfoundry.xml
index 9793e38..70923e6 100644
--- a/2.0.x/spring-cloud-cloudfoundry.xml
+++ b/2.0.x/spring-cloud-cloudfoundry.xml
@@ -65,7 +65,7 @@ are configured, they default per the user&#8217;s profile in Cloud Foundry.</sim
 <note>
 <simpara>All of the OAuth2 SSO and resource server features moved to Spring Boot
 in version 1.3. You can find documentation in the
-<link xl:href="http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
+<link xl:href="https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
 </note>
 <simpara>This project provides automatic binding from CloudFoundry service
 credentials to the Spring Boot features. If you have a CloudFoundry
diff --git a/2.1.x/spring-cloud-cloudfoundry.xml b/2.1.x/spring-cloud-cloudfoundry.xml
index 39e0d08..a5b46bb 100644
--- a/2.1.x/spring-cloud-cloudfoundry.xml
+++ b/2.1.x/spring-cloud-cloudfoundry.xml
@@ -65,7 +65,7 @@ are configured, they default per the user&#8217;s profile in Cloud Foundry.</sim
 <note>
 <simpara>All of the OAuth2 SSO and resource server features moved to Spring Boot
 in version 1.3. You can find documentation in the
-<link xl:href="http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
+<link xl:href="https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
 </note>
 <simpara>This project provides automatic binding from CloudFoundry service
 credentials to the Spring Boot features. If you have a CloudFoundry
diff --git a/font-awesome/font/fontawesome-webfont.svg b/font-awesome/font/fontawesome-webfont.svg
index 2edb4ec..8b349d5 100755
--- a/font-awesome/font/fontawesome-webfont.svg
+++ b/font-awesome/font/fontawesome-webfont.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
 <svg xmlns="http://www.w3.org/2000/svg">
 <metadata></metadata>
 <defs>
diff --git a/spring-cloud-cloudfoundry.xml b/spring-cloud-cloudfoundry.xml
index 9793e38..70923e6 100644
--- a/spring-cloud-cloudfoundry.xml
+++ b/spring-cloud-cloudfoundry.xml
@@ -65,7 +65,7 @@ are configured, they default per the user&#8217;s profile in Cloud Foundry.</sim
 <note>
 <simpara>All of the OAuth2 SSO and resource server features moved to Spring Boot
 in version 1.3. You can find documentation in the
-<link xl:href="http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
+<link xl:href="https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/">Spring Boot user guide</link>.</simpara>
 </note>
 <simpara>This project provides automatic binding from CloudFoundry service
 credentials to the Spring Boot features. If you have a CloudFoundry
diff --git a/spring-cloud-starter-cloudfoundry/target/checkstyle-checker.xml b/spring-cloud-starter-cloudfoundry/target/checkstyle-checker.xml
index 5803182..0338b93 100644
--- a/spring-cloud-starter-cloudfoundry/target/checkstyle-checker.xml
+++ b/spring-cloud-starter-cloudfoundry/target/checkstyle-checker.xml
@@ -1,7 +1,7 @@
 <?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="com.puppycrawl.tools.checkstyle.Checker">
 
 	<module name="SuppressionFilter">
diff --git a/target/checkstyle-checker.xml b/target/checkstyle-checker.xml
index 5803182..0338b93 100644
--- a/target/checkstyle-checker.xml
+++ b/target/checkstyle-checker.xml
@@ -1,7 +1,7 @@
 <?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="com.puppycrawl.tools.checkstyle.Checker">
 
 	<module name="SuppressionFilter">