diff --git a/README.md b/README.md
index deac356..792ed77 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 The Tsuut'ina morphology and tools
 ==================================
 
+[![Maturity](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fgiellalt%2Flang-srs%2Fgh-pages%2Fmaturity.json)](https://giellalt.github.io/MaturityClassification.html)
 ![Lemma count](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fgiellalt%2Flang-srs%2Fgh-pages%2Flemmacount.json)
 [![GitHub issues](https://img.shields.io/github/issues-raw/giellalt/lang-srs)](https://github.com/giellalt/lang-srs/issues)
 [![Build Status](https://divvun-tc.giellalt.org/api/github/v1/repository/giellalt/lang-srs/main/badge.svg)](https://github.com/giellalt/lang-srs/actions)
diff --git a/docs/index-header.md b/docs/index-header.md
index 8028852..9407603 100644
--- a/docs/index-header.md
+++ b/docs/index-header.md
@@ -1,5 +1,6 @@
 # Sarsi documentation
 
+[![Maturity](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fgiellalt%2Flang-srs%2Fgh-pages%2Fmaturity.json)](https://giellalt.github.io/MaturityClassification.html)
 ![Lemma count](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fgiellalt%2Flang-srs%2Fgh-pages%2Flemmacount.json)
 [![License](https://img.shields.io/github/license/giellalt/lang-srs)](https://github.com/giellalt/lang-srs/blob/main/LICENSE)
 [![Issues](https://img.shields.io/github/issues/giellalt/lang-srs)](https://github.com/giellalt/lang-srs/issues)