diff --git a/docs/tutorials/utils-ndn-regex.rst b/docs/tutorials/utils-ndn-regex.rst
index 6492a96..af107c0 100644
--- a/docs/tutorials/utils-ndn-regex.rst
+++ b/docs/tutorials/utils-ndn-regex.rst
@@ -6,7 +6,7 @@
 
 A name component matcher, enclosed in ``<`` and ``>``, specifies the pattern of a name component. The
 component pattern is expressed with the `Perl Regular Expression Syntax
-<http://www.boost.org/doc/libs/1_55_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html>`__.
+<https://www.boost.org/doc/libs/1_58_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html>`__.
 For example, ``<ab*c>`` matches the 1st, 3rd, and 4th components of ``/ac/dc/abc/abbc``, but does
 not match the 2nd component. A special case is that ``<>`` denotes a wildcard matcher that can match
 **ANY** name component.