diff --git a/doc/en/linkchecker.1 b/doc/en/linkchecker.1
index 9b1c7798..56384e9e 100644
--- a/doc/en/linkchecker.1
+++ b/doc/en/linkchecker.1
@@ -99,7 +99,7 @@ Output to a file \fBlinkchecker\-out.\fP\fITYPE\fP,
The \fIENCODING\fP specifies the output encoding, the default is
that of your locale.
Valid encodings are listed at
-.UR http://docs.python.org/library/codecs.html#standard-encodings
+.UR https://docs.python.org/library/codecs.html#standard-encodings
.UE .
.br
The \fIFILENAME\fP and \fIENCODING\fP parts of the \fBnone\fP output type
@@ -127,7 +127,7 @@ below.
.br
The \fIENCODING\fP specifies the output encoding, the default is
that of your locale. Valid encodings are listed at
-.UR http://docs.python.org/library/codecs.html#standard-encodings
+.UR https://docs.python.org/library/codecs.html#standard-encodings
.UE .
.TP
\fB\-q\fP, \fB\-\-quiet\fP
@@ -240,7 +240,7 @@ Log check result as machine-readable XML.
.TP
\fBsitemap\fP
Log check result as an XML sitemap whose protocol is documented at
-.UR http://www.sitemaps.org/protocol.html
+.UR https://www.sitemaps.org/protocol.html
.UE .
.TP
\fBsql\fP
@@ -258,7 +258,7 @@ Logs nothing. Suitable for debugging or checking the exit code.
.SH REGULAR EXPRESSIONS
LinkChecker accepts Python regular expressions.
See
-.UR http://docs.python.org/howto/regex.html
+.UR https://docs.python.org/howto/regex.html
.UE
for an introduction.
@@ -483,11 +483,11 @@ might slow down the program or even the whole system.
.br
\fBlinkchecker\-out.\fP\fITYPE\fP - default logger file output name
.br
-.UR http://docs.python.org/library/codecs.html#standard-encodings
+.UR https://docs.python.org/library/codecs.html#standard-encodings
.UE
\- valid output encodings
.br
-.UR http://docs.python.org/howto/regex.html
+.UR https://docs.python.org/howto/regex.html
.UE
\- regular expression documentation
diff --git a/doc/en/linkcheckerrc.5 b/doc/en/linkcheckerrc.5
index 05e21afa..49526789 100644
--- a/doc/en/linkcheckerrc.5
+++ b/doc/en/linkcheckerrc.5
@@ -189,7 +189,7 @@ below.
.br
The \fIENCODING\fP specifies the output encoding, the default is
that of your locale. Valid encodings are listed at
-.UR http://docs.python.org/library/codecs.html#standard-encodings
+.UR https://docs.python.org/library/codecs.html#standard-encodings
.UE .
.br
Command line option: \fB\-\-output\fP
@@ -230,7 +230,7 @@ Command line option: none
.TP
\fBencoding=\fP\fISTRING\fP
Valid encodings are listed in
-.UR http://docs.python.org/library/codecs.html#standard-encodings
+.UR https://docs.python.org/library/codecs.html#standard-encodings
.UE .
.br
Default encoding is \fBiso\-8859\-15\fP.
@@ -484,7 +484,7 @@ Configures the expiration warning time in days.
.SS \fB[HtmlSyntaxCheck]\fP
Check the syntax of HTML pages with the online W3C HTML validator.
See
-.UR http://validator.w3.org/docs/api.html
+.UR https://validator.w3.org/docs/api.html
.UE .
.SS \fB[HttpHeaderInfo]\fP
@@ -497,7 +497,7 @@ to display all HTTP headers that start with "X-".
.SS \fB[CssSyntaxCheck]\fP
Check the syntax of HTML pages with the online W3C CSS validator.
See
-.UR http://jigsaw.w3.org/css-validator/manual.html#expert
+.UR https://jigsaw.w3.org/css-validator/manual.html#expert
.UE .
.SS \fB[VirusCheck]\fP
diff --git a/doc/web/media/man1/linkchecker.1.html b/doc/web/media/man1/linkchecker.1.html
index 122473e6..4dda688a 100644
--- a/doc/web/media/man1/linkchecker.1.html
+++ b/doc/web/media/man1/linkchecker.1.html
@@ -124,7 +124,7 @@ linkchecker - command line client to check HTML documents and websites for
FILENAME if specified. The ENCODING specifies the output
encoding, the default is that of your locale. Valid encodings are listed
at
- http://docs.python.org/library/codecs.html#standard-encodings.
+ https://docs.python.org/library/codecs.html#standard-encodings.
The FILENAME and ENCODING parts of the none output type
will be ignored, else if the file already exists, it will be overwritten.
@@ -146,7 +146,7 @@ linkchecker - command line client to check HTML documents and websites for
The ENCODING specifies the output encoding, the default is that of
your locale. Valid encodings are listed at
- http://docs.python.org/library/codecs.html#standard-encodings.
+ https://docs.python.org/library/codecs.html#standard-encodings.
An addition is that a leading exclamation mark negates the regular expression.
@@ -495,10 +495,10 @@ LinkChecker consumes memory for each queued URL to check. With thousands of