diff --git a/README.md b/README.md
index 87930d3..c0f94aa 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,11 @@ python setup.py install
 
 Call the API using:
 
+Cython is a dependency which can be installed using
+```
+pip install cython
+```
+
 ```python
 import fastBPE