diff --git a/src/main/resources/gmm/tables/README.md b/src/main/resources/gmm/tables/README.md
index 4f42d24b3f9b6c4e7daa573b82a79707320e4e02..834ffd090ca394cb3ad9a74b2fef1a62a8ee543a 100644
--- a/src/main/resources/gmm/tables/README.md
+++ b/src/main/resources/gmm/tables/README.md
@@ -8,4 +8,4 @@ for PGA and PGV separately.
 **Reference:** Chapman, M.C. and Guo, Z., 2021, A response spectral ratio model to account for
 amplification and attenuation effects in the Atlantic and Gulf coastal plain: Bulletin of the
 Seismological Society of America, v. 111, n. 4, p. 1849-1867.
-doi: https://doi.org/10.1785/0120200322
+doi: <https://doi.org/10.1785/0120200322>