diff --git a/README.md b/README.md
index b9ddd836..80d2bbaa 100644
--- a/README.md
+++ b/README.md
@@ -16,11 +16,11 @@ libvips is licensed under the [LGPL
 2.1+](https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html).
 
 It has around [300
-operations](http://libvips.github.io/libvips/API/current/func-list.html)
+operations](https://libvips.github.io/libvips/API/current/func-list.html)
 covering arithmetic, histograms, convolution, morphological
 operations, frequency filtering, colour, resampling,
 statistics and others. It supports a large range of [numeric
-types](http://libvips.github.io/libvips/API/current/VipsImage.html#VipsBandFormat),
+types](https://libvips.github.io/libvips/API/current/VipsImage.html#VipsBandFormat),
 from 8-bit int to 128-bit complex. Images can have any number of bands.
 It supports a good range of image formats, including JPEG, TIFF, PNG,
 WebP, HEIC, AVIF, FITS, Matlab, OpenEXR, PDF, SVG, HDR, PPM / PGM / PFM,
@@ -28,10 +28,10 @@ CSV, GIF, Analyze, NIfTI, DeepZoom, and OpenSlide. It can also load images
 via ImageMagick or GraphicsMagick, letting it work with formats like DICOM.
 
 It comes with bindings for
-[C](http://libvips.github.io/libvips/API/current/using-from-c.html),
-[C++](http://libvips.github.io/libvips/API/current/using-from-cpp.html),
+[C](https://libvips.github.io/libvips/API/current/using-from-c.html),
+[C++](https://libvips.github.io/libvips/API/current/using-from-cpp.html),
 and the
-[command-line](http://libvips.github.io/libvips/API/current/using-cli.html).
+[command-line](https://libvips.github.io/libvips/API/current/using-cli.html).
 Full bindings are available for [Ruby](https://rubygems.org/gems/ruby-vips),
 [Python](https://pypi.python.org/pypi/pyvips),
 [PHP](https://github.com/libvips/php-vips),
@@ -42,9 +42,9 @@ is used as an image processing engine by [sharp
 (on node.js)](https://www.npmjs.org/package/sharp),
 [bimg](https://github.com/h2non/bimg), [sharp
 for Go](https://github.com/DAddYE/vips), [Ruby on
-Rails](http://edgeguides.rubyonrails.org/active_storage_overview.html),
+Rails](https://edgeguides.rubyonrails.org/active_storage_overview.html),
 [carrierwave-vips](https://github.com/eltiare/carrierwave-vips),
-[mediawiki](http://www.mediawiki.org/wiki/Extension:VipsScaler),
+[mediawiki](https://www.mediawiki.org/wiki/Extension:VipsScaler),
 [PhotoFlow](https://github.com/aferrero2707/PhotoFlow) and others.
 The official libvips GUI is [nip2](https://github.com/libvips/nip2),
 a strange combination of a spreadsheet and an photo editor.