diff --git a/README.rst b/README.rst
index 12babe2..2f6b7bf 100644
--- a/README.rst
+++ b/README.rst
@@ -1,3 +1,5 @@
+⚠️ this branch was created in 2016 and is now outdated. See master branch for current codebase.
+
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 Create ZIM files out of HTTP websites
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