diff --git a/.gitattributes b/.gitattributes
index bf31128..85e51fb 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3,6 +3,7 @@
 /.gitattributes export-ignore
 /.gitignore export-ignore
 /.laminas-ci.json export-ignore
+/.markdownlint.json export-ignore
 /.psr-container.php.stub export-ignore
 /phpcs.xml export-ignore
 /phpunit.xml.dist export-ignore
diff --git a/README.md b/README.md
index 0b2a48b..a79beaf 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # kynx/mezzio-openapi
 
+[![Continuous Integration](https://github.com/kynx/mezzio-openapi/actions/workflows/continuous-integration.yml/badge.svg)](https://github.com/kynx/mezzio-openapi/actions/workflows/continuous-integration.yml)
+
 Runtime library for OpenAPI applications built using [kynx/mezzio-openapi-generator].
 
 [kynx/mezzio-openapi-generator]: https://github.com/kynx/mezzio-openapi-generator