diff --git a/CHANGELOG.md b/CHANGELOG.md
index e89fce21..ca42006f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Add Zenodo DOI badge to README; upgrade the BibTeX citation block with the concept DOI (`10.5281/zenodo.19646175`) and list author as Isaac Gerber (matching `CITATION.cff`). Add `doi:` and `identifiers:` entries (concept + versioned) to `CITATION.cff`. DOI was minted by Zenodo when v3.1.3 was released.
+
 ## [3.1.3] - 2026-04-18
 
 ### Added
diff --git a/CITATION.cff b/CITATION.cff
index 0503cb0e..8e0d8a4b 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -9,6 +9,14 @@ authors:
 license: MIT
 version: "3.1.3"
 date-released: "2026-04-18"
+doi: "10.5281/zenodo.19646175"
+identifiers:
+  - type: doi
+    value: "10.5281/zenodo.19646175"
+    description: "Concept DOI — always resolves to the latest release"
+  - type: doi
+    value: "10.5281/zenodo.19646176"
+    description: "Versioned DOI for v3.1.3"
 url: "https://github.com/igerber/diff-diff"
 repository-code: "https://github.com/igerber/diff-diff"
 keywords:
diff --git a/README.md b/README.md
index f6b32a66..4c8bbd88 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
 [![Downloads](https://img.shields.io/pypi/dm/diff-diff.svg)](https://pypi.org/project/diff-diff/)
 [![Documentation](https://readthedocs.org/projects/diff-diff/badge/?version=stable)](https://diff-diff.readthedocs.io/en/stable/)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.19646175.svg)](https://doi.org/10.5281/zenodo.19646175)
 
 A Python library for Difference-in-Differences (DiD) causal inference analysis with an sklearn-like API and statsmodels-style outputs.
 
@@ -3067,14 +3068,20 @@ If you use diff-diff in your research, please cite it:
 ```bibtex
 @software{diff_diff,
   title = {diff-diff: Difference-in-Differences Causal Inference for Python},
-  author = {{diff-diff contributors}},
+  author = {Gerber, Isaac},
+  year = {2026},
   url = {https://github.com/igerber/diff-diff},
+  doi = {10.5281/zenodo.19646175},
   license = {MIT},
 }
 ```
 
+The DOI above is the Zenodo concept DOI — it always resolves to the latest release. To cite a specific version, look up its versioned DOI on [the Zenodo project page](https://doi.org/10.5281/zenodo.19646175).
+
 See [`CITATION.cff`](CITATION.cff) for the full citation metadata.
 
+**Note on authorship**: academic citation (`CITATION.cff`, the BibTeX above) lists individual authors with ORCIDs per scholarly convention. Package metadata surfaces (`pyproject.toml`, Sphinx docs) list "diff-diff contributors" to acknowledge the collective — see [`CONTRIBUTORS.md`](CONTRIBUTORS.md) for the full list.
+
 ## License
 
 MIT License