diff --git a/tools/builder/core.sh b/tools/builder/core.sh
index e5b9b1e6..08b37107 100644
--- a/tools/builder/core.sh
+++ b/tools/builder/core.sh
@@ -151,7 +151,7 @@ DISTS=$DISTS'
     XML-NamespaceSupport https://cpan.metacpan.org/authors/id/P/PE/PERIGRIN/XML-NamespaceSupport-1.12.tar.gz    perl5/lib/perl5/XML/NamespaceSupport.pm
     XML-SAX-Base    https://cpan.metacpan.org/authors/id/G/GR/GRANTM/XML-SAX-Base-1.09.tar.gz                   perl5/lib/perl5/XML/SAX/Base.pm
     XML-SAX         https://cpan.metacpan.org/authors/id/G/GR/GRANTM/XML-SAX-1.02.tar.gz                        perl5/lib/perl5/XML/SAX.pm
-    docbook2x       https://downloads.sourceforge.net/project/docbook2x/docbook2x/0.8.8/docbook2X-0.8.8.tar.gz  bin/docbook2man
+    docbook2x       https://downloads.sourceforge.net/docbook2x/docbook2X-0.8.8.tar.gz  bin/docbook2man
     expat           https://github.com/libexpat/libexpat/releases/download/R_2_7_1/expat-2.7.1.tar.xz           lib/libexpat.a
     libpng          https://download.sourceforge.net/libpng/libpng-1.6.47.tar.xz                                lib/libpng.a
     libjpeg-turbo   https://github.com/libjpeg-turbo/libjpeg-turbo/archive/3.1.0.tar.gz                         lib/libjpeg.a
@@ -175,7 +175,7 @@ DISTS=$DISTS'
     docbook-xsl     https://downloads.sourceforge.net/project/docbook/docbook-xsl/1.79.1/docbook-xsl-1.79.1.tar.bz2       share/xml/docbook/stylesheet/docbook-xsl/catalog.xml
     docbook-xsl-ns  https://downloads.sourceforge.net/project/docbook/docbook-xsl-ns/1.79.1/docbook-xsl-ns-1.79.1.tar.bz2 share/xml/docbook/stylesheet/docbook-xsl-ns/catalog.xml
     python2         https://www.python.org/ftp/python/2.7.18/Python-2.7.18.tar.xz                               bin/python
-    python3         https://www.python.org/ftp/python/3.10.6/Python-3.13.3.tar.xz                               bin/python3
+    python3         https://www.python.org/ftp/python/3.13.3/Python-3.13.3.tar.xz                               bin/python3
     swig            https://sourceforge.net/projects/swig/files/swig/swig-4.0.2/swig-4.0.2.tar.gz/download      bin/swig
     doxygen         https://www.doxygen.nl/files/doxygen-1.13.2.src.tar.gz                                      bin/doxygen
     XML-Parser      https://cpan.metacpan.org/authors/id/T/TO/TODDR/XML-Parser-2.47.tar.gz                      perl5/man/man3/XML*Parser.3*