diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index b6659410ef..6f139b8fc3 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -8193,7 +8193,7 @@ sub git_feed {
 	my $have_blame = gitweb_check_feature('blame');
 
 	# Atom: http://www.atomenabled.org/developers/syndication/
-	# RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
+	# RSS:  https://web.archive.org/web/20030729001534/http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
 	if ($format ne 'rss' && $format ne 'atom') {
 		die_error(400, "Unknown web feed format");
 	}
diff --git a/sha1dc/sha1.c b/sha1dc/sha1.c
index dede2cbddf..f993ef9c69 100644
--- a/sha1dc/sha1.c
+++ b/sha1dc/sha1.c
@@ -88,7 +88,7 @@
 /*
  * Should define Big Endian for a whitelist of known processors. See
  * https://sourceforge.net/p/predef/wiki/Endianness/ and
- * http://www.oracle.com/technetwork/server-storage/solaris/portingtosolaris-138514.html
+ * https://web.archive.org/web/20140421151132/http://www.perforce.com/perforce/doc.current/manuals/p4sag/chapter.superuser.html
  */
 #define SHA1DC_BIGENDIAN
 
diff --git a/t/lib-gpg.sh b/t/lib-gpg.sh
index 83b83c9abb..add11e88fc 100644
--- a/t/lib-gpg.sh
+++ b/t/lib-gpg.sh
@@ -13,7 +13,7 @@ test_lazy_prereq GPG '
 	gpg_version=$(gpg --version 2>&1)
 	test $? != 127 || exit 1
 
-	# As said here: http://www.gnupg.org/documentation/faqs.html#q6.19
+	# As said here: https://web.archive.org/web/20130212022238/https://www.gnupg.org/faq/gnupg-faq.html#why-does-gnupg-1.0.6-bail-out-on-keyrings-used-with-1.0.7
 	# the gpg version 1.0.6 did not parse trust packets correctly, so for
 	# that version, creation of signed tags using the generated key fails.
 	case "$gpg_version" in
diff --git a/t/t9816-git-p4-locked.sh b/t/t9816-git-p4-locked.sh
index 932841003c..5e904ac80d 100755
--- a/t/t9816-git-p4-locked.sh
+++ b/t/t9816-git-p4-locked.sh
@@ -9,7 +9,7 @@ test_expect_success 'start p4d' '
 '
 
 # See
-# http://www.perforce.com/perforce/doc.current/manuals/p4sag/03_superuser.html#1088563
+# https://web.archive.org/web/20150602090517/http://www.perforce.com/perforce/doc.current/manuals/p4sag/chapter.superuser.html#superuser.basic.typemap_locking
 # for suggestions on how to configure "sitewide pessimistic locking"
 # where only one person can have a file open for edit at a time.
 test_expect_success 'init depot' '