diff --git a/README.md b/README.md
index 14418a9..2293aae 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,7 @@ Then run the bot using your API keys.
 
 ```
 docker run --detach \
-     -e discord=DISCORD_TOKEN \
+     -e DISCORD=DISCORD_TOKEN \
      -e IEX=IEX_TOKEN \
       simple-discord-bot
 ```