diff --git a/CITATION.cff b/CITATION.cff
index 5a3e61a..83ccd57 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -19,6 +19,10 @@ authors:
 repository-code: "https://github.com/Kankelborg-Group/furst-optics"
 url: "https://furst-optics.readthedocs.io"
 license: BSD-3-Clause
+identifiers:
+  - type: doi
+    description: Concept DOI, which always resolves to the latest version
+    value: "10.5281/zenodo.23116748"
 keywords:
   - FURST
   - sounding rocket
diff --git a/README.md b/README.md
index 9fd8189..c01b211 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@
 [![Ruff](https://github.com/Kankelborg-Group/furst-optics/actions/workflows/ruff.yml/badge.svg)](https://github.com/Kankelborg-Group/furst-optics/actions/workflows/ruff.yml)
 [![Documentation Status](https://readthedocs.org/projects/furst-optics/badge/?version=latest)](https://furst-optics.readthedocs.io/en/latest/?badge=latest)
 [![PyPI version](https://badge.fury.io/py/furst-optics.svg)](https://badge.fury.io/py/furst-optics)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.23116748.svg)](https://doi.org/10.5281/zenodo.23116748)
 
 A model of the optical design for the Full-sun Ultraviolet Rocket Spectrometer (FURST).
 
@@ -22,14 +23,23 @@ pip install furst-optics
 If you use furst-optics in your research, please cite it.
 The citation metadata is kept in [`CITATION.cff`](https://github.com/Kankelborg-Group/furst-optics/blob/main/CITATION.cff),
 which the "Cite this repository" button on GitHub can export as BibTeX or APA.
+
+Every release of furst-optics is archived on Zenodo with its own DOI.
+The concept DOI, [10.5281/zenodo.23116748](https://doi.org/10.5281/zenodo.23116748),
+always resolves to the latest version,
+and the Zenodo page lists the DOI of every version.
 Please include the version of furst-optics that you used,
 which is given by `importlib.metadata.version("furst-optics")`.
+The BibTeX entry below uses the concept DOI.
+To cite a specific version instead,
+replace `doi` with the DOI of that version.
 
 ```bibtex
 @software{furst-optics,
   author = {Smart, Roy T. and Kankelborg, Charles C.},
   title = {furst-optics},
   version = {X.Y.Z},
+  doi = {10.5281/zenodo.23116748},
   url = {https://github.com/Kankelborg-Group/furst-optics},
 }
 ```
diff --git a/docs/index.rst b/docs/index.rst
index 73b3b41..d96308c 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -38,8 +38,17 @@ The citation metadata is kept in
 which the "Cite this repository" button on the
 `GitHub page <https://github.com/Kankelborg-Group/furst-optics>`_
 can export as BibTeX or APA.
+
+Every release of :mod:`furst` is archived on Zenodo with its own DOI.
+The concept DOI,
+`10.5281/zenodo.23116748 <https://doi.org/10.5281/zenodo.23116748>`_,
+always resolves to the latest version,
+and the Zenodo page lists the DOI of every version.
 Please include the version of :mod:`furst` that you used,
 which is given by ``importlib.metadata.version("furst-optics")``.
+The BibTeX entry below uses the concept DOI.
+To cite a specific version instead,
+replace ``doi`` with the DOI of that version.
 
 .. code-block:: bibtex
 
@@ -47,6 +56,7 @@ which is given by ``importlib.metadata.version("furst-optics")``.
       author = {Smart, Roy T. and Kankelborg, Charles C.},
       title = {furst-optics},
       version = {X.Y.Z},
+      doi = {10.5281/zenodo.23116748},
       url = {https://github.com/Kankelborg-Group/furst-optics},
     }