diff --git a/README.md b/README.md
index bf9a415..4c4e727 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 > Sphinx extension for peeking at references
 
+**In Development!**
+
 The extension adds a small icon next to select references,
 that can be clicked to peek at the target of the reference.
 
diff --git a/docs/index.rst b/docs/index.rst
index 1f5ccaa..b02d3ae 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -3,6 +3,8 @@ sphinx-peek
 
     Sphinx extension for peeking at :ref:`references <other-note>`
 
+**In Development!**
+
 The extension adds a small icon next to select references,
 that can be clicked to peek at the target of the reference.