diff --git a/README.md b/README.md
index a0622b3..76c84f7 100644
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@@ -1 +1,3 @@
 workers + graphql playground
+
+deploying this project requires a KV binding called `GRAPHQL_ON_WORKERS` to be defined for your application. if you don't want to set this up, comment out [this line](https://github.com/signalnerve/workers-graphql/blob/master/src/handlers/apollo.js#L43) before deploy