diff --git a/README.md b/README.md
index ceb4875..035614c 100644
--- a/README.md
+++ b/README.md
@@ -120,13 +120,9 @@ Currently, following stages of development are available:
 
 1. [http://www.gnu.org/software/grub/manual/multiboot/](http://www.gnu.org/software/grub/manual/multiboot/)
 2. [http://www.osdever.net/tutorials/view/brans-kernel-development-tutorial](http://www.osdever.net/tutorials/view/brans-kernel-development-tutorial)
-3. [http://www.jamesmolloy.co.uk/tutorial_html/index.html](http://www.jamesmolloy.co.uk/tutorial_html/index.html)
-4. [http://techblog.lankes.org/tutorials/](http://techblog.lankes.org/tutorials/)
-5. [https://www.acs.eonerc.rwth-aachen.de/cms/e-on-erc-acs/studium/lehrveranstaltungen/~xwyom/grundgebiete-der-informatik-4-betriebs/?lidx=1](https://www.acs.eonerc.rwth-aachen.de/cms/e-on-erc-acs/studium/lehrveranstaltungen/~xwyom/grundgebiete-der-informatik-4-betriebs/?lidx=1)
-6. [http://www.noteblok.net/2014/06/14/bachelor](http://www.noteblok.net/2014/06/14/bachelor)
-7. [https://sourceware.org/newlib/](https://sourceware.org/newlib/)
-8. [http://rwth-os.github.io/eduOS/](http://rwth-os.github.io/eduOS/)
-9. [https://intermezzos.github.io](https://intermezzos.github.io)
+3. [https://www.acs.eonerc.rwth-aachen.de/cms/e-on-erc-acs/studium/lehrveranstaltungen/~xwyom/grundgebiete-der-informatik-4-betriebs/?lidx=1](https://www.acs.eonerc.rwth-aachen.de/cms/e-on-erc-acs/studium/lehrveranstaltungen/~xwyom/grundgebiete-der-informatik-4-betriebs/?lidx=1)
+4. [http://rwth-os.github.io/eduOS/](http://rwth-os.github.io/eduOS/)
+5. [https://intermezzos.github.io](https://intermezzos.github.io)
 
 ## License