diff --git a/README.md b/README.md
index 0ddff15..2aaa502 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+
 Repository for reproducing the paper **"Coherent streamflow variability in Monsoon Asia over the past eight centuries---links to oceanic drivers"** (Nguyen *et al*, submitted).
 
 To run, first download the whole repo in your desktop, unzip to a folder, and switch your working directory to it.