diff --git a/CITATION.cff b/CITATION.cff
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index 0000000..1b93e67
--- /dev/null
+++ b/CITATION.cff
@@ -0,0 +1,8 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+authors:
+- family-names: "Sun"
+  given-names: "Yimin"
+title: "gmsm"
+date-released: 2021-1-20
+url: "https://github.com/emmansun/gmsm"
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