diff --git a/README.adoc b/README.adoc
index b984fbd..be09747 100644
--- a/README.adoc
+++ b/README.adoc
@@ -8,3 +8,9 @@ Please consult the documentation for using it:
 - *link:https://docs.restorecommerce.io/architecture/index.html[General Architecture]*
 
 Part of link:https://github.com/restorecommerce[Restorecommerce].
+
+*⚠️ WARNING ⚠️* _Don’t serve this API publicly to the internet unless
+you are aware of the risks. It allows API users to run any JavaScript
+code inside a Chrome session on the server. It’s fairly easy to expose
+the contents of files on the server. You have been warned!. See
+https://github.com/alvarcarto/url-to-pdf-api/issues/12 for background._
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