diff --git a/LICENSE.txt b/LICENSE.txt
index d6456956..62589edd 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,7 +1,7 @@
 
                                  Apache License
                            Version 2.0, January 2004
-                        http://www.apache.org/licenses/
+                        https://www.apache.org/licenses/
 
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
@@ -193,7 +193,7 @@
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
 
-       http://www.apache.org/licenses/LICENSE-2.0
+       https://www.apache.org/licenses/LICENSE-2.0
 
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/resources/src/main/resources/docbkx/xsl/common.xsl b/resources/src/main/resources/docbkx/xsl/common.xsl
index 171b5fa0..4b96c12f 100644
--- a/resources/src/main/resources/docbkx/xsl/common.xsl
+++ b/resources/src/main/resources/docbkx/xsl/common.xsl
@@ -9,7 +9,7 @@
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at
 
-   http://www.apache.org/licenses/LICENSE-2.0
+   https://www.apache.org/licenses/LICENSE-2.0
 
  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an
diff --git a/resources/src/main/resources/docbkx/xsl/html-multipage.xsl b/resources/src/main/resources/docbkx/xsl/html-multipage.xsl
index 3772b502..3ab9d03b 100644
--- a/resources/src/main/resources/docbkx/xsl/html-multipage.xsl
+++ b/resources/src/main/resources/docbkx/xsl/html-multipage.xsl
@@ -9,7 +9,7 @@ to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at
 
-http://www.apache.org/licenses/LICENSE-2.0
+https://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
diff --git a/resources/src/main/resources/docbkx/xsl/html-singlepage.xsl b/resources/src/main/resources/docbkx/xsl/html-singlepage.xsl
index 749fd534..cdf05a99 100644
--- a/resources/src/main/resources/docbkx/xsl/html-singlepage.xsl
+++ b/resources/src/main/resources/docbkx/xsl/html-singlepage.xsl
@@ -9,7 +9,7 @@ to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at
 
-http://www.apache.org/licenses/LICENSE-2.0
+https://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
diff --git a/resources/src/main/resources/docbkx/xsl/html.xsl b/resources/src/main/resources/docbkx/xsl/html.xsl
index 139a4dfd..90649236 100644
--- a/resources/src/main/resources/docbkx/xsl/html.xsl
+++ b/resources/src/main/resources/docbkx/xsl/html.xsl
@@ -9,7 +9,7 @@ to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at
 
-http://www.apache.org/licenses/LICENSE-2.0
+https://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
diff --git a/resources/src/main/resources/docbkx/xsl/pdf.xsl b/resources/src/main/resources/docbkx/xsl/pdf.xsl
index 49bf3bba..fd38c8ac 100644
--- a/resources/src/main/resources/docbkx/xsl/pdf.xsl
+++ b/resources/src/main/resources/docbkx/xsl/pdf.xsl
@@ -9,7 +9,7 @@ to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at
 
-http://www.apache.org/licenses/LICENSE-2.0
+https://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an