Add dependencies to README

README.md

@@ -8,4 +8,9 @@ As shown in the figure above, the transformation between `.drawio` files and a [
 
 Note: The generation of OML has been moved to this repo:
 
-https://msdl.uantwerpen.be/git/jexelmans/drawio2oml
+https://msdl.uantwerpen.be/git/jexelmans/drawio2oml
+
+## Dependencies
+
+Only the Python 3 standard library.
+Developed with Python 3.10.