diff --git a/README.md b/README.md
index d4c9c16a..f4ed7037 100644
--- a/README.md
+++ b/README.md
@@ -14,8 +14,9 @@ The `master` branch contains the latest work-in-progress version of limit orders
 
 Please, use the commit tagged version to get the latest production version that has passed through a series of security audits:
 
-- tag `v2` - [Limit order protocol v2](https://github.com/1inch/limit-order-protocol/releases/tag/v2) / [security audits](https://github.com/1inch/1inch-audits/tree/master/Limit%20Order%20Protocol%20V2)
+- tag `4.0.0` [Limit order protocol v4](https://github.com/1inch/limit-order-protocol/tree/4.0.0) / [security audits](https://github.com/1inch/1inch-audits/tree/master/Aggregation%20Pr.%20V6%20and%20Limit%20Order%20Pr.V4)
 - tag `3.0.1` [Limit order protocol v3](https://github.com/1inch/limit-order-protocol/tree/3.0.1) / [security audits](https://github.com/1inch/1inch-audits/tree/master/Aggregation%20Pr.%20V5%20and%20Limit%20Order%20Pr.V3)
+- tag `v2` - [Limit order protocol v2](https://github.com/1inch/limit-order-protocol/tree/v2) / [security audits](https://github.com/1inch/1inch-audits/tree/master/Limit%20Order%20Protocol%20V2)
 
 ### About