diff --git a/README.md b/README.md
index 48c834b..2664223 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,11 @@
 
 ![](./broth16.jpg)
 
-This is an exercise to learn how Groth16 works.
+This is an exercise to learn how Groth16 works. Consider it a toy implementation. DO NOT USE IT FOR ANYTHING SERIOUS.
+
+## Curve
+
+The curve used in this implementation is BLS12-381. It's also using my [toy implementation of asymmetric pairings on BLS12-381](https://github.com/kevincharm/blstoise).
 
 ## Useful reference material