diff --git a/README.md b/README.md
index a7e0f4c0..e3ec48c4 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@ pip install pyElli[fitting]
 This installs pyElli with the additional fitting capabilities and interactive widgets.
 If you don't want to have this functionality just drop the `[fitting]` in the end.
 
-To increase performance of the 4x4 Solver for anisotropic media, it is recommended to
+To increase performance of the 4x4 Solver by a factor of 20, it is recommended to
 install PyTorch CPU package manually, as it is too heavy to include in the standard installation.
 Installation information can be found at the [PyTorch Website](https://pytorch.org/get-started/locally/).
 
diff --git a/docs/installation.rst b/docs/installation.rst
index a063c329..ad5c4ea2 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -15,7 +15,7 @@ To install the package in your current virtual environment execute
 This installs pyElli with the additional fitting capabilities and interactive widgets.
 If you don't want to have this functionality just drop the `[fitting]` in the end.
 
-To increase performance of the 4x4 Solver for anisotropic media, it is recommended to
+To increase performance of the 4x4 Solver by a factor of 20, it is recommended to
 install PyTorch CPU package manually, as it is too heavy to include in the standard installation.
 Installation information can be found at the `PyTorch Website <https://pytorch.org/get-started/locally/>`.