diff --git a/README.md b/README.md
index e514bdf..0a3ba69 100644
--- a/README.md
+++ b/README.md
@@ -8,4 +8,6 @@ a content based movie recommendation system
 poetry shell # python3 -m venv my_env && source my_env/bin/activate
 poetry install
 waitress-serve --port=8041 app:app
-```
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+```
+
+Don't forget to set `PINECONE_API_DEFAULT`
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