diff --git a/README.md b/README.md
index 996f65e..0861072 100644
--- a/README.md
+++ b/README.md
@@ -134,7 +134,7 @@ Follow the instructions in https://github.com/TEXTurePaper/TEXTurePaper and crea
 
 ## Others
 
-If tetrahedral grids of higher resolutions are needed, first follow the README in `nvdiffrec/data/tets` and use quartet (https://github.com/crawforddoran/quartet) to generate a uniform tetrahedral grid. Then run `nvdiffrec/data/tets/crop_tets.py` to remove the boundary (so that translational symmetry holds in the resulted grid).
+If tetrahedral grids of higher resolutions are needed, first follow the README in `nvdiffrec/data/tets` and use [quartet](https://github.com/crawforddoran/quartet) to generate a uniform tetrahedral grid. Then run `nvdiffrec/data/tets/crop_tets.py` to remove the boundary (so that translational symmetry holds in the resulted grid).
 
 ## Blender Visualization