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+++ b/vocabularies/scripts/README.md
@@ -1,3 +1,3 @@
 # Scripts
 
-Python scripts for converting CSV vocabulary file to JSON-LD. These scripts require the third-party [rdflib library](https://github.com/RDFLib/rdflib) and the [rdflib-jsonld extension](https://github.com/RDFLib/rdflib-jsonld) to run.  
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+Python 2.7 (not tested with Python 3) scripts for converting CSV vocabulary file to JSON-LD. These scripts require the third-party [rdflib library](https://github.com/RDFLib/rdflib) and the [rdflib-jsonld extension](https://github.com/RDFLib/rdflib-jsonld) to run.