diff --git a/docs/pom.xml b/docs/pom.xml
index a37c52c7..7989e137 100644
--- a/docs/pom.xml
+++ b/docs/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns:xsi="http://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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 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>
 	<artifactId>spring-cloud-build-docs</artifactId>
 	<name>spring-cloud-build-docs</name>
diff --git a/pom.xml b/pom.xml
index 3139cc4e..32ed0a31 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns:xsi="http://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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 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>
 	<groupId>org.springframework.cloud</groupId>
 	<artifactId>spring-cloud-build</artifactId>
diff --git a/spring-cloud-build-dependencies/pom.xml b/spring-cloud-build-dependencies/pom.xml
index 62a62ffc..c46fe6e0 100644
--- a/spring-cloud-build-dependencies/pom.xml
+++ b/spring-cloud-build-dependencies/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns:xsi="http://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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 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>
 	<groupId>org.springframework.cloud</groupId>
 	<artifactId>spring-cloud-build-dependencies</artifactId>
diff --git a/spring-cloud-build-tools/pom.xml b/spring-cloud-build-tools/pom.xml
index 1110997b..a3e874b4 100644
--- a/spring-cloud-build-tools/pom.xml
+++ b/spring-cloud-build-tools/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns:xsi="http://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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 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>
 	<groupId>org.springframework.cloud</groupId>
 	<artifactId>spring-cloud-build-tools</artifactId>
diff --git a/spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml b/spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml
index 2c620df6..f5f67058 100644
--- a/spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml
+++ b/spring-cloud-build-tools/src/checkstyle/checkstyle-suppressions.xml
@@ -1,7 +1,7 @@
 <?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="[\\/]src[\\/]test[\\/](java|groovy)[\\/]"
 			  checks="(Javadoc*|HideUtility*)"/>
diff --git a/spring-cloud-build-tools/src/main/resources/checkstyle.xml b/spring-cloud-build-tools/src/main/resources/checkstyle.xml
index 84b99566..e140830d 100644
--- a/spring-cloud-build-tools/src/main/resources/checkstyle.xml
+++ b/spring-cloud-build-tools/src/main/resources/checkstyle.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/spring-cloud-dependencies-parent/pom.xml b/spring-cloud-dependencies-parent/pom.xml
index 011ea95c..c4f8a92c 100644
--- a/spring-cloud-dependencies-parent/pom.xml
+++ b/spring-cloud-dependencies-parent/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns:xsi="http://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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 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>
 	<groupId>org.springframework.cloud</groupId>
 	<version>2.2.0.BUILD-SNAPSHOT</version>