diff --git a/README.md b/README.md
index 24201bd9..40dc4cc8 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 The Moksha morphology and tools
 ==========================================
 
+[![Maturity](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fgiellalt%2Flang-mdf%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-mdf%2Fgh-pages%2Flemmacount.json)
 [![GitHub issues](https://img.shields.io/github/issues-raw/giellalt/lang-mdf)](https://github.com/giellalt/lang-mdf/issues)
 [![Build Status](https://divvun-tc.giellalt.org/api/github/v1/repository/giellalt/lang-mdf/main/badge.svg)](https://github.com/giellalt/lang-mdf/actions)
diff --git a/docs/index-header.md b/docs/index-header.md
index 34fb61a5..10b7134e 100644
--- a/docs/index-header.md
+++ b/docs/index-header.md
@@ -1,5 +1,6 @@
 # Moksha documentation
 
+[![Maturity](https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fgiellalt%2Flang-mdf%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-mdf%2Fgh-pages%2Flemmacount.json)
 [![License](https://img.shields.io/github/license/giellalt/lang-mdf)](https://github.com/giellalt/lang-mdf/blob/main/LICENSE)
 [![Issues](https://img.shields.io/github/issues/giellalt/lang-mdf)](https://github.com/giellalt/lang-mdf/issues)