Index: pst/printing/cups-filters.xml
===================================================================
--- pst/printing/cups-filters.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/printing/cups-filters.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -111,5 +111,5 @@
       <xref role="runtime" linkend="gutenprint"/> (for supported printers),
       or other printer drivers, such as <ulink role="runtime"
-      url="http://sourceforge.net/projects/hplip/files/hplip/">hplip</ulink>
+      url="https://sourceforge.net/projects/hplip/files/hplip/">hplip</ulink>
     </para>
 
Index: pst/ps/mupdf.xml
===================================================================
--- pst/ps/mupdf.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/ps/mupdf.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -7,5 +7,5 @@
 <!--Using archive URL, because when a new version is released, older and new
 can be found there, no need to change directory -->
-  <!ENTITY mupdf-download-http "http://www.mupdf.com/downloads/archive/mupdf-&mupdf-version;-source.tar.gz">
+  <!ENTITY mupdf-download-http "https://www.mupdf.com/downloads/archive/mupdf-&mupdf-version;-source.tar.gz">
   <!ENTITY mupdf-download-ftp  " ">
   <!ENTITY mupdf-md5sum        "6f42be1365350f05270f8776517a3872">
Index: pst/scanning/sane.xml
===================================================================
--- pst/scanning/sane.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/scanning/sane.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -174,5 +174,5 @@
       scanner will need the <xref linkend="libusb"/> package. For HP devices,
       you may need <ulink
-      url="http://sourceforge.net/projects/hplip/files/hplip/">hplip</ulink>.
+      url="https://sourceforge.net/projects/hplip/files/hplip/">hplip</ulink>.
       Ensure you have the necessary drivers properly configured to access
       the devices.
Index: pst/sgml/docbook-3.1-dtd.xml
===================================================================
--- pst/sgml/docbook-3.1-dtd.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/sgml/docbook-3.1-dtd.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -5,5 +5,5 @@
   %general-entities;
 
-  <!ENTITY sgml-dtd-3-download-http "http://www.docbook.org/sgml/&docbook-3.1-dtd-version;/docbk31.zip">
+  <!ENTITY sgml-dtd-3-download-http "https://www.docbook.org/sgml/&docbook-3.1-dtd-version;/docbk31.zip">
   <!ENTITY sgml-dtd-3-download-ftp  " ">
   <!ENTITY sgml-dtd-3-md5sum        "432749c0c806dbae81c8bcb70da3b5d3">
Index: pst/sgml/docbook-4.5-dtd.xml
===================================================================
--- pst/sgml/docbook-4.5-dtd.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/sgml/docbook-4.5-dtd.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -5,5 +5,5 @@
   %general-entities;
 
-  <!ENTITY sgml-dtd-download-http "http://www.docbook.org/sgml/&docbook-4.5-dtd-version;/docbook-&docbook-4.5-dtd-version;.zip">
+  <!ENTITY sgml-dtd-download-http "https://www.docbook.org/sgml/&docbook-4.5-dtd-version;/docbook-&docbook-4.5-dtd-version;.zip">
   <!ENTITY sgml-dtd-download-ftp  " ">
   <!ENTITY sgml-dtd-md5sum        "07c581f4bbcba6d3aac85360a19f95f7">
Index: pst/typesetting/biber.xml
===================================================================
--- pst/typesetting/biber.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/typesetting/biber.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -25,6 +25,6 @@
   <!-- Check path.  Directory might not be &biblatex-version; if a suffixed update -->
   <!-- for normal unsuffixed version: e.g. for 3.15a
-  <!ENTITY biblatex-download-http   "http://sourceforge.net/projects/biblatex/files/biblatex-3.15/biblatex-&biblatex-version;.tds.tgz"> -->
-  <!ENTITY biblatex-download-http   "http://sourceforge.net/projects/biblatex/files/biblatex-&biblatex-version;/biblatex-&biblatex-version;.tds.tgz">
+  <!ENTITY biblatex-download-http   "https://sourceforge.net/projects/biblatex/files/biblatex-3.15/biblatex-&biblatex-version;.tds.tgz"> -->
+  <!ENTITY biblatex-download-http   "https://sourceforge.net/projects/biblatex/files/biblatex-&biblatex-version;/biblatex-&biblatex-version;.tds.tgz">
   <!ENTITY biblatex-download-ftp    "">
   <!ENTITY biblatex-md5sum          "30342c8ef5309e838968fcb06a314a36">
Index: pst/xml/docbook-45-xml.xml
===================================================================
--- pst/xml/docbook-45-xml.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/xml/docbook-45-xml.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -5,5 +5,5 @@
   %general-entities;
 
-  <!ENTITY DocBook-download-http "http://www.docbook.org/xml/&docBook-45-xml-version;/docbook-xml-&docBook-45-xml-version;.zip">
+  <!ENTITY DocBook-download-http "https://www.docbook.org/xml/&docBook-45-xml-version;/docbook-xml-&docBook-45-xml-version;.zip">
   <!ENTITY DocBook-download-ftp  " ">
   <!ENTITY DocBook-md5sum        "03083e288e87a7e829e437358da7ef9e">
Index: pst/xml/docbook-xsl.xml
===================================================================
--- pst/xml/docbook-xsl.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/xml/docbook-xsl.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -129,5 +129,5 @@
       <xref role="runtime" linkend="zip"/> 
          (to produce <quote>epub3</quote> documents), and
-      <ulink url="http://sourceforge.net/projects/saxon/files/saxon6/">
+      <ulink url="https://sourceforge.net/projects/saxon/files/saxon6/">
         Saxon6
       </ulink> and
Index: pst/xml/xmlto.xml
===================================================================
--- pst/xml/xmlto.xml	(revision 8df3cdc8103a0f9506ceddbe4ddcfb60f8c4a35f)
+++ pst/xml/xmlto.xml	(revision c6b192c037001878e21111781429cbf8b97c1e7d)
@@ -87,5 +87,5 @@
       <xref role="runtime" linkend="fop"/>,
 <!--    <ulink url="http://dblatex.sourceforge.net/">dblatex</ulink>, and -->
-      <ulink url="http://sourceforge.net/projects/dblatex/files/dblatex/">dblatex</ulink>, and
+      <ulink url="https://sourceforge.net/projects/dblatex/files/dblatex/">dblatex</ulink>, and
       <ulink url="http://www.garshol.priv.no/download/xmltools/prod/PassiveTeX.html">
       PassiveTeX</ulink>
