diff --git a/CITATION.cff b/CITATION.cff
index 60e87842e4d7bef74100eb9363cb5c5e75357a2a..45f0db84494c2360015a04490d22ca4c24610b3b 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -46,3 +46,4 @@ version: 2022.1.7
 doi: 10.5281/zenodo.6533949
 date-released: 2022-05-04
 url: "https://github.com/inducer/pytools"
+license: MIT