diff --git a/docs/installation.rst b/docs/installation.rst
index 1c16a8e..15fefcd 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -4,6 +4,15 @@
 Installation
 ============
 
+.. Warning::
+
+   ElasticUtils doesn't work well with ElasticSearch 0.19.9. If you're
+   using 0.19.9, you should update to at least 0.19.10.
+
+   https://github.com/elasticsearch/elasticsearch/issues/2205
+     ElasticSearch bug with ``_all``.
+
+
 There are a few ways to install ElasticUtils.