diff --git a/README.md b/README.md
index c416198..4ae2937 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,11 @@
 Rust implementation of the Poseidon2 hash function over the BN254 curve's scalar field,
 with permutation state width `t=3`. 
 
+We plan to integrate this into Plonky2, to allow an efficient BN254 recursive wrapper.
+For this we need some custom features: For example when computing the Fiat-Shamir
+challenges, we need a duplex construction which can absorb and squeeze both
+BN254 and Goldilocks field elements.
+
 Currently using [arkworks](https://github.com/arkworks-rs) for field arithmetic
 (maybe replace it with something more light-weight in the future...)