diff --git a/doc/platforms-html5.dox b/doc/platforms-html5.dox
index 935339cd8..9b965b93d 100644
--- a/doc/platforms-html5.dox
+++ b/doc/platforms-html5.dox
@@ -330,7 +330,7 @@ element) from the page to avoid them affecting the canvas. Combining
 Besides the canvas, there's minimal styling for @cb{.html} <h1> @ce,
 @cb{.html} <p> @ce and @cb{.html} <code> @ce tags. Putting extra content inside
 the @cb{.css} div#sizer @ce will center it, following the canvas width. If you
-need more advanced styling, check out [m.css](http://mcss.mosra.cz).
+need more advanced styling, check out [m.css](https://mcss.mosra.cz).
 
 @note It's also possible to modify the container CSS classes from the C++ side
     using @ref Platform::EmscriptenApplication::setContainerCssClass() /
diff --git a/src/Magnum/Platform/WebApplication.css b/src/Magnum/Platform/WebApplication.css
index 7fc279b10..1590bd8d1 100644
--- a/src/Magnum/Platform/WebApplication.css
+++ b/src/Magnum/Platform/WebApplication.css
@@ -23,7 +23,7 @@
     DEALINGS IN THE SOFTWARE.
 */
 
-/* Colors kept in sync with m.css dark theme, http://mcss.mosra.cz */
+/* Colors kept in sync with m.css dark theme, https://mcss.mosra.cz */
 
 *, ::before, ::after { box-sizing: border-box; }