diff --git a/coq-color.opam b/coq-color.opam
index 8ad238dd..23148c9b 100644
--- a/coq-color.opam
+++ b/coq-color.opam
@@ -1,7 +1,7 @@
 opam-version: "2.0"
 synopsis: "A library on rewriting theory and termination"
 homepage: "http://color.inria.fr/"
-license: "CeCILL"
+license: "CeCILL-2.1"
 bug-reports: "https://github.com/fblanqui/color/issues"
 depends: [
   "ocaml"