diff --git a/README.rst b/README.rst
index ad4545c..8a31750 100644
--- a/README.rst
+++ b/README.rst
@@ -49,10 +49,11 @@ Contribute
 Please do not hesitate to contact me if you have suggestions or wish to request
 new functionalities. I still have a lot of materials from my PhD to organize
 and make available here. This will comprise, depending on my free time, a PFR
-with imposed wall temperature, an adiabatic PFR (adapted from
-[here](https://github.com/Cantera/cantera-jupyter/blob/master/reactors/1D_pfr_surfchem.ipynb)),
+with imposed wall temperature, an adiabatic PFR (adapted from here_),
 and an automatic skeletal mechanism generation with DRG method.
 
+.. _here: https://github.com/Cantera/cantera-jupyter/blob/master/reactors/1D_pfr_surfchem.ipynb
+
 Email: waltermateriais@gmail.com
 
 Limitations