diff --git a/pom.xml b/pom.xml
index 4dfb9c1fad..40ac402b71 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
 <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">
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/maven-v4_0_0.xsd">
   <parent>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-parent</artifactId>
diff --git a/src/main/assembly/bin.xml b/src/main/assembly/bin.xml
index 0e329c114a..d66df480fa 100644
--- a/src/main/assembly/bin.xml
+++ b/src/main/assembly/bin.xml
@@ -16,7 +16,7 @@
 -->
 <assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
+    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 https://maven.apache.org/xsd/assembly-2.2.0.xsd">
     <id>bin</id>
     <formats>
         <format>tar.gz</format>
diff --git a/src/main/assembly/src-tar-gz.xml b/src/main/assembly/src-tar-gz.xml
index 5323f3718c..c40ee56d8a 100644
--- a/src/main/assembly/src-tar-gz.xml
+++ b/src/main/assembly/src-tar-gz.xml
@@ -16,7 +16,7 @@
 -->
 <assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
+    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 https://maven.apache.org/xsd/assembly-2.2.0.xsd">
     <id>src</id>
     <formats>
         <format>tar.gz</format>
diff --git a/src/main/assembly/src-zip.xml b/src/main/assembly/src-zip.xml
index d7603072f2..a98573669a 100644
--- a/src/main/assembly/src-zip.xml
+++ b/src/main/assembly/src-zip.xml
@@ -16,7 +16,7 @@
 -->
 <assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 http://maven.apache.org/xsd/assembly-2.2.0.xsd">
+    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 https://maven.apache.org/xsd/assembly-2.2.0.xsd">
     <id>src</id>
     <formats>
         <format>zip</format>
diff --git a/src/site/site.xml b/src/site/site.xml
index d1b49f2ade..e33153fd13 100644
--- a/src/site/site.xml
+++ b/src/site/site.xml
@@ -17,7 +17,7 @@
   -->
 <project name="Apache Commons DBCP"
   xmlns="http://maven.apache.org/DECORATION/1.8.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/DECORATION/1.8.0 http://maven.apache.org/xsd/decoration-1.8.0.xsd">
+  xsi:schemaLocation="http://maven.apache.org/DECORATION/1.8.0 https://maven.apache.org/xsd/decoration-1.8.0.xsd">
   <bannerRight>
     <name>Commons DBCP</name>
     <src>/images/dbcp-logo-white.png</src>