### Resources
-* Homepage: <http://opencv.org>
-* Docs: <http://docs.opencv.org/3.4/>
+* Homepage: <https://opencv.org>
+ * Courses: <https://opencv.org/courses>
+* Docs: <https://docs.opencv.org/4.x/>
* Q&A forum: <https://forum.opencv.org>
* previous forum (read only): <http://answers.opencv.org>
* Issue tracking: <https://github.com/opencv/opencv/issues>
+* Additional OpenCV functionality: <https://github.com/opencv/opencv_contrib>
+
### Contributing