Index: .travis.yml
===================================================================
diff -u -r717b102a96212ce2fea1604e3788a0bf7fea0ce6 -r1544e5c005ac27a7806c8b11d806c3f58d3ed2c9
--- .travis.yml	(.../.travis.yml)	(revision 717b102a96212ce2fea1604e3788a0bf7fea0ce6)
+++ .travis.yml	(.../.travis.yml)	(revision 1544e5c005ac27a7806c8b11d806c3f58d3ed2c9)
@@ -170,8 +170,8 @@
   found, continuing" ; fi
 install:
 - mkdir -p $KITS
-- if [ $TRAVIS_OS_NAME = linux ]; then URL=http://kitcreator.rkeene.org/kits/840dec4286102c869d85bae3b0dcd32565e7bf12/tclkit;
-  else URL=http://kitcreator.rkeene.org/kits/6967b89da1f6af7b12cdc82819f3bdb13a661242/tclkit;
+- if [ $TRAVIS_OS_NAME = linux ]; then URL=http://kitcreator.rkeene.org/kits/c8fe6fba3323b12b924b4a0716609abbaa00822c/tclkit;
+  else URL=http://kitcreator.rkeene.org/kits/31eaf9ae17e769609700b41d1d3c9abeda27510d/tclkit;
   fi
 - if [ ! -f ${KITS}/tclkit.$TRAVIS_OS_NAME ]; then wget -O ${KITS}/tclkit.$TRAVIS_OS_NAME
   $URL && chmod +x ${KITS}/tclkit.$TRAVIS_OS_NAME; fi
Index: apps/build.tcl
===================================================================
diff -u -rfb2a31e7cc403e9130f7a6b381d18ad9f93c34b6 -r1544e5c005ac27a7806c8b11d806c3f58d3ed2c9
--- apps/build.tcl	(.../build.tcl)	(revision fb2a31e7cc403e9130f7a6b381d18ad9f93c34b6)
+++ apps/build.tcl	(.../build.tcl)	(revision 1544e5c005ac27a7806c8b11d806c3f58d3ed2c9)
@@ -1,10 +1,18 @@
+# w/o tls
 # linux: https://kitcreator.rkeene.org/kits/840dec4286102c869d85bae3b0dcd32565e7bf12/tclkit
-# osx: https://kitcreator.rkeene.org/kits/6967b89da1f6af7b12cdc82819f3bdb13a661242/tclkit
+# macos: https://kitcreator.rkeene.org/kits/6967b89da1f6af7b12cdc82819f3bdb13a661242/tclkit
 
+# w/ tls
+# linux: http://kitcreator.rkeene.org/kits/c8fe6fba3323b12b924b4a0716609abbaa00822c/tclkit
+# macos: http://kitcreator.rkeene.org/kits/31eaf9ae17e769609700b41d1d3c9abeda27510d/tclkit
+
 package require http
 package require tar
 package require platform
+package require tls
 
+http::register https 443 [list ::tls::socket -tls1 1]
+
 proc ::build {HOMEDIR BUILDDIR TCLTAG {TOOLCHAIN autoconf-tea}} {
   set tarball "tcl.tar.gz"
   set INSTALLDIR [file join $HOMEDIR install]
@@ -14,7 +22,7 @@
   set fh [open $tarball wb+]
   try {
 
-    ::http::geturl http://core.tcl.tk/tcl/tarball/$tarball?uuid=$TCLTAG \
+    ::http::geturl https://core.tcl-lang.org/tcl/tarball/$tarball?uuid=$TCLTAG \
         -binary true \
         -channel $fh
 
Index: appveyor.yml
===================================================================
diff -u -r717b102a96212ce2fea1604e3788a0bf7fea0ce6 -r1544e5c005ac27a7806c8b11d806c3f58d3ed2c9
--- appveyor.yml	(.../appveyor.yml)	(revision 717b102a96212ce2fea1604e3788a0bf7fea0ce6)
+++ appveyor.yml	(.../appveyor.yml)	(revision 1544e5c005ac27a7806c8b11d806c3f58d3ed2c9)
@@ -14,7 +14,7 @@
   MINGW_DIR: mingw64
   MINGW_URL: https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/8.1.0/threads-win32/seh/x86_64-8.1.0-release-win32-seh-rt_v6-rev0.7z
   MINGW_ARCHIVE: x86_64-8.1.0-release-win32-seh-rt_v6-rev0.7z
-  TCLKIT_URL: http://kitcreator.rkeene.org/kits/43b2a6f8b159514a79e4330cb4d2dbb3a47f7acc/tclkit.exe
+  TCLKIT_URL: http://kitcreator.rkeene.org/kits/32c6369ff6ef02a685b75854237635d4a3d56611/tclkit.exe
   TCLKIT: tclkit.exe
   matrix:
   - TCLTAG: core-8-6-branch