diff --git a/CITATION.cff b/CITATION.cff
index 02e8cfd..23a9ddc 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -24,7 +24,7 @@ preferred-citation:
   - family-names: "Gámez"
     given-names: "José A."
     orcid: "https://orcid.org/0000-0003-1188-1117"
-   - family-names: "Puerta"
+  - family-names: "Puerta"
     given-names: "José M."
     orcid: "https://orcid.org/0000-0002-9164-5191"
   doi: "10.1007/978-3-030-85713-4_6"