diff --git a/core/pom.xml b/core/pom.xml
index e773afa..fee25f1 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>spring-plugin-core</artifactId>
diff --git a/core/src/test/resources/application-context.xml b/core/src/test/resources/application-context.xml
index fa672a7..9e7458d 100644
--- a/core/src/test/resources/application-context.xml
+++ b/core/src/test/resources/application-context.xml
@@ -2,8 +2,8 @@
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:plugin="http://www.springframework.org/schema/plugin"
 	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/plugin http://www.springframework.org/schema/plugin/spring-plugin.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/plugin https://www.springframework.org/schema/plugin/spring-plugin.xsd">
 
 	<plugin:list id="foo" class="org.springframework.plugin.core.SamplePlugin" />
 	
diff --git a/metadata/pom.xml b/metadata/pom.xml
index 1d97240..c80a204 100644
--- a/metadata/pom.xml
+++ b/metadata/pom.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>spring-plugin-metadata</artifactId>
 
diff --git a/pom.xml b/pom.xml
index 050dc5c..7fa6a0c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.springframework.plugin</groupId>
 	<artifactId>spring-plugin</artifactId>