diff --git a/README.md b/README.md
index d311207c64f207857032a67926d4642cfd206fc3..027c7d686d0517a99a0764f050b1ab15bfff2f88 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,8 @@ $ npm install
 
 Name .env.example to .env and ormconfig.json.example to ormconfig.json and add values accordingly.
 
+**.env names are case sensitive!**
+
 Needed postgresql modules:
 ```bash
 # Inside the database that you're connecting to: