diff --git a/README.md b/README.md
index 5ba40a44..ac8e04a8 100644
--- a/README.md
+++ b/README.md
@@ -328,11 +328,11 @@ print(client.fetch_market_depth_by_symbol(a))
 
 #### Option Chain
 ```py
-client.get_expiry("N","NIFTY")
+client.get_expiry("N","nifty")
 # Returns list of all active expiries
 
-# client.get_option_chain("N","NIFTY",<Pass expiry timestamp from get_expiry response>)
-client.get_option_chain("N","NIFTY",1647507600000)
+# client.get_option_chain("N","nifty",<Pass expiry timestamp from get_expiry response>)
+client.get_option_chain("N","nifty",1647507600000)
 ```
 
 #### Historical Data