diff --git a/CITATION.cff b/CITATION.cff
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--- /dev/null
+++ b/CITATION.cff
@@ -0,0 +1,11 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+authors:
+- family-names: "Grogan"
+  given-names: "Paul"
+  orcid: "https://orcid.org/0000-0001-8986-4806"
+title: "tatc"
+version: 3.4.9
+# doi: 
+date-released: 2025-06-12
+url: "https://github.com/code-lab-org/tatc"