diff --git a/README b/README
index 54dd9c38ccb2d75202b54329714629f8d67e4640..8dd89ff767db5b607815a3ab35059e82eb80ebef 100644
--- a/README
+++ b/README
@@ -13,6 +13,9 @@ For more information, go to http://software.seg.org/2017/00XX .
 You must read and accept usage terms at:
 http://software.seg.org/disclaimer.txt before use.
 
+DOI reference of release
+1.4.0 https://zenodo.org/badge/latestdoi/23060862
+
 REFERENCES
 ---------
 -1- If the Finite Difference code has helped you in your research please refer to our paper in your publications: