diff --git a/README.rst b/README.rst
index a05150f..2896d76 100644
--- a/README.rst
+++ b/README.rst
@@ -6,7 +6,7 @@
 Django Hashid Field
 ====================
 
-.. caution::
+.. warning::
     This library has been retired. It is no longer recommended for new projects. Existing projects do not require
     changes, but should consider migrating to a different library. See the [RETIRED](RETIRED.md) document for more
     information.