diff --git a/doc/source/index.rst b/doc/source/index.rst
index c578b484..67d64d1a 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -58,7 +58,5 @@ If you use pytransform3d for a scientific publication, I would appreciate
 citation of the following paper:
 
 Fabisch, A. (2019). pytransform3d: 3D Transformations for Python.
-Journal of Open Source Software, 4(33), 1159, |DOI|_
-
-.. |DOI| image:: http://joss.theoj.org/papers/10.21105/joss.01159/status.svg
-.. _DOI: https://doi.org/10.21105/joss.01159
+Journal of Open Source Software, 4(33), 1159,
+https://doi.org/10.21105/joss.01159