diff --git a/Help/manual/cmake-language.7.rst b/Help/manual/cmake-language.7.rst
index d0774cb989..dba953db05 100644
--- a/Help/manual/cmake-language.7.rst
+++ b/Help/manual/cmake-language.7.rst
@@ -224,7 +224,7 @@ For example::
  They interpret the opening bracket as the start of an
  `Unquoted Argument`_.
 
-.. _`Lua`: http://www.lua.org/
+.. _`Lua`: https://www.lua.org/
 
 .. _`Quoted Argument`:
 
diff --git a/Modules/FeatureSummary.cmake b/Modules/FeatureSummary.cmake
index 77c66d14af..009ca38955 100644
--- a/Modules/FeatureSummary.cmake
+++ b/Modules/FeatureSummary.cmake
@@ -17,7 +17,7 @@ packages and/or feature for a build tree such as::
     PNG, A PNG image library., <http://www.libpng.org/pub/png/>
        * Enables saving screenshots
     -- The following OPTIONAL packages have not been found:
-    Lua51, The Lua scripting language., <http://www.lua.org>
+    Lua51, The Lua scripting language., <https://www.lua.org>
        * Enables macros in MyWordProcessor
     Foo, Foo provides cool stuff.