diff --git a/docs/index.md b/docs/index.md
index 17f0797..753be53 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -25,7 +25,8 @@ First [install](install_guide) the package.
 
 Then, check out the [basic usage](basic-usage) page.
 
-## Acknowledgements
+## A brief history of *psignifit*
+
 The development of *psignifit* began in the mid 1990's by Felix Wichmann when
 he worked for his doctoral degree at the University of Oxford.
 
@@ -91,6 +92,8 @@ of the [*Vision Research* paper](http://www.sciencedirect.com/science/article/pi
 
 Since then the *psignifit* Python library is maintained by several [contributors](https://github.com/wichmann-lab/python-psignifit/blob/main/CONTRIBUTORS). 
 
+## Acknowledgements
+
 Our thanks go to the reviewers of our manuscript and the
 students and colleagues who read the paper or tested the software and
 provided feedback: Nicole Eichert, Frank Jäkel, David Janssen, Britta