diff --git a/README.md b/README.md
index 523993e..c537c3b 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ $ pip install torch-scatter torch-sparse -f https://data.pyg.org/whl/torch-2.4.0
 $ pip install ramannoodle[torch]
 ```
 
-Ramannoodle includes interfaces with [pymatgen](https://pymatgen.org/). To use these interfaces, ramannoodle should be installed with the `[pymatgen]` option:
+Ramannoodle includes interfaces with [pymatgen](https://pymatgen.org/). To use these interfaces, ramannoodle should be installed with the `pymatgen` options group:
 
 ```
 $ pip install ramannoodle[pymatgen]