diff --git a/Cargo.lock b/Cargo.lock
index 6b1c1b4d..6a41358e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -980,7 +980,7 @@ checksum = "5caaa75cbd2b960ff1e5392d2cfb1f44717fffe12fc1f32b7b5d1267f99732a6"
 [[package]]
 name = "ecdsa_fun"
 version = "0.7.1"
-source = "git+https://github.com/LLFourn/secp256kfun#7c3d592bae20cd4b4309ed6cf6551dc971fed43e"
+source = "git+https://github.com/LLFourn/secp256kfun#8b2f3012e151cbab5296ec3bdc4510d3404dad75"
 dependencies = [
  "bincode",
  "rand_chacha 0.3.1",
@@ -3416,7 +3416,7 @@ dependencies = [
 [[package]]
 name = "secp256kfun"
 version = "0.7.1"
-source = "git+https://github.com/LLFourn/secp256kfun#7c3d592bae20cd4b4309ed6cf6551dc971fed43e"
+source = "git+https://github.com/LLFourn/secp256kfun#8b2f3012e151cbab5296ec3bdc4510d3404dad75"
 dependencies = [
  "digest 0.10.3",
  "rand_core 0.6.2",
@@ -3625,7 +3625,7 @@ dependencies = [
 [[package]]
 name = "sigma_fun"
 version = "0.4.1"
-source = "git+https://github.com/LLFourn/secp256kfun#7c3d592bae20cd4b4309ed6cf6551dc971fed43e"
+source = "git+https://github.com/LLFourn/secp256kfun#8b2f3012e151cbab5296ec3bdc4510d3404dad75"
 dependencies = [
  "curve25519-dalek-ng",
  "digest 0.10.3",
diff --git a/swap/src/monero_ext.rs b/swap/src/monero_ext.rs
index 7d3ce2a3..96ca5116 100644
--- a/swap/src/monero_ext.rs
+++ b/swap/src/monero_ext.rs
@@ -1,5 +1,5 @@
 use crate::bitcoin::Scalar;
-use ecdsa_fun::fun::marker::{Mark, NonZero, Secret};
+use ecdsa_fun::fun::marker::{NonZero, Secret};
 
 pub trait ScalarExt {
     fn to_secpfun_scalar(&self) -> ecdsa_fun::fun::Scalar;
@@ -14,7 +14,7 @@ impl ScalarExt for crate::monero::Scalar {
 
         ecdsa_fun::fun::Scalar::from_bytes(big_endian_bytes)
             .expect("valid scalar")
-            .mark::<NonZero>()
+            .non_zero()
             .expect("non-zero scalar")
     }
 }
diff --git a/swap/src/proptest.rs b/swap/src/proptest.rs
index 1fa7e7e6..7ad8fb9a 100644
--- a/swap/src/proptest.rs
+++ b/swap/src/proptest.rs
@@ -2,17 +2,15 @@ use proptest::prelude::*;
 
 pub mod ecdsa_fun {
     use super::*;
-    use ::ecdsa_fun::fun::marker::{Mark, NonZero, Normal};
     use ::ecdsa_fun::fun::{Point, Scalar, G};
 
     pub fn point() -> impl Strategy<Value = Point> {
-        scalar()
-            .prop_map(|mut scalar| Point::even_y_from_scalar_mul(G, &mut scalar).mark::<Normal>())
+        scalar().prop_map(|mut scalar| Point::even_y_from_scalar_mul(G, &mut scalar).normalize())
     }
 
     pub fn scalar() -> impl Strategy<Value = Scalar> {
         prop::array::uniform32(0..255u8).prop_filter_map("generated the 0 element", |bytes| {
-            Scalar::from_bytes_mod_order(bytes).mark::<NonZero>()
+            Scalar::from_bytes_mod_order(bytes).non_zero()
         })
     }
 }
diff --git a/swap/src/protocol.rs b/swap/src/protocol.rs
index 88077bc3..5bf1f5b4 100644
--- a/swap/src/protocol.rs
+++ b/swap/src/protocol.rs
@@ -6,7 +6,6 @@ use crate::{bitcoin, monero};
 use anyhow::Result;
 use async_trait::async_trait;
 use conquer_once::Lazy;
-use ecdsa_fun::fun::marker::Mark;
 use libp2p::{Multiaddr, PeerId};
 use serde::{Deserialize, Serialize};
 use sha2::Sha256;
@@ -22,7 +21,7 @@ pub static CROSS_CURVE_PROOF_SYSTEM: Lazy<
     CrossCurveDLEQ<HashTranscript<Sha256, rand_chacha::ChaCha20Rng>>,
 > = Lazy::new(|| {
     CrossCurveDLEQ::<HashTranscript<Sha256, rand_chacha::ChaCha20Rng>>::new(
-        (*ecdsa_fun::fun::G).mark::<ecdsa_fun::fun::marker::Normal>(),
+        (*ecdsa_fun::fun::G).normalize(),
         curve25519_dalek::constants::ED25519_BASEPOINT_POINT,
     )
 });