diff --git a/.github/workflows/deny.yml b/.github/workflows/deny.yml
index 11dbc3eef4b..c1b1da95ea2 100644
--- a/.github/workflows/deny.yml
+++ b/.github/workflows/deny.yml
@@ -21,6 +21,6 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
-      - uses: EmbarkStudios/cargo-deny-action@v1
+      - uses: EmbarkStudios/cargo-deny-action@8d73959fce1cdc8989f23fdf03bec6ae6a6576ef
         with:
-          command: check all
\ No newline at end of file
+          command: check all
diff --git a/Cargo.lock b/Cargo.lock
index 48474cc79b1..995f43567fc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2828,12 +2828,12 @@ dependencies = [
 
 [[package]]
 name = "light-poseidon"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c9a85a9752c549ceb7578064b4ed891179d20acd85f27318573b64d2d7ee7ee"
+checksum = "39e3d87542063daaccbfecd78b60f988079b6ec4e089249658b9455075c78d42"
 dependencies = [
- "ark-bn254 0.4.0",
- "ark-ff 0.4.2",
+ "ark-bn254 0.5.0",
+ "ark-ff 0.5.0",
  "num-bigint",
  "thiserror",
 ]
@@ -3030,9 +3030,7 @@ name = "nargo_cli"
 version = "1.0.0-beta.3"
 dependencies = [
  "acvm",
- "ark-bn254 0.4.0",
  "ark-bn254 0.5.0",
- "ark-ff 0.4.2",
  "assert_cmd",
  "assert_fs",
  "async-lsp",
diff --git a/tooling/nargo_cli/Cargo.toml b/tooling/nargo_cli/Cargo.toml
index 5aa37cffcda..a80828356ff 100644
--- a/tooling/nargo_cli/Cargo.toml
+++ b/tooling/nargo_cli/Cargo.toml
@@ -99,12 +99,7 @@ sha3.workspace = true
 iai = "0.1.1"
 test-case.workspace = true
 lazy_static.workspace = true
-light-poseidon = "0.2.0"
-
-ark-bn254-v04 = { package = "ark-bn254", version = "^0.4.0", default-features = false, features = [
-    "curve",
-] }
-ark-ff-v04 = { package = "ark-ff", version = "^0.4.0", default-features = false }
+light-poseidon = "0.3.0"
 
 [[bench]]
 name = "criterion"
diff --git a/tooling/nargo_cli/tests/stdlib-props.rs b/tooling/nargo_cli/tests/stdlib-props.rs
index 2e153b85ba8..7c52d6f25db 100644
--- a/tooling/nargo_cli/tests/stdlib-props.rs
+++ b/tooling/nargo_cli/tests/stdlib-props.rs
@@ -78,8 +78,8 @@ fn run_snippet_proptest(
         Err(e) => panic!("failed to compile program; brillig = {force_brillig}:\n{source}\n{e:?}"),
     };
 
-    let pedandic_solving = true;
-    let blackbox_solver = bn254_blackbox_solver::Bn254BlackBoxSolver(pedandic_solving);
+    let pedantic_solving = true;
+    let blackbox_solver = bn254_blackbox_solver::Bn254BlackBoxSolver(pedantic_solving);
     let foreign_call_executor = RefCell::new(DefaultForeignCallBuilder::default().build());
 
     // Generate multiple input/output
@@ -290,17 +290,13 @@ fn fuzz_poseidon2_equivalence() {
 
 #[test]
 fn fuzz_poseidon_equivalence() {
-    use ark_ff_v04::{BigInteger, PrimeField};
     use light_poseidon::{Poseidon, PoseidonHasher};
 
     let poseidon_hash = |inputs: &[FieldElement]| {
-        let mut poseidon = Poseidon::<ark_bn254_v04::Fr>::new_circom(inputs.len()).unwrap();
-        let frs: Vec<ark_bn254_v04::Fr> = inputs
-            .iter()
-            .map(|f| ark_bn254_v04::Fr::from_be_bytes_mod_order(&f.to_be_bytes()))
-            .collect::<Vec<_>>();
-        let hash = poseidon.hash(&frs).expect("failed to hash");
-        FieldElement::from_be_bytes_reduce(&hash.into_bigint().to_bytes_be())
+        let mut poseidon = Poseidon::<ark_bn254::Fr>::new_circom(inputs.len()).unwrap();
+        let frs: Vec<ark_bn254::Fr> = inputs.iter().map(|f| f.into_repr()).collect::<Vec<_>>();
+        let hash: ark_bn254::Fr = poseidon.hash(&frs).expect("failed to hash");
+        FieldElement::from_repr(hash)
     };
 
     // Noir has hashes up to length 16, but the reference library won't work with more than 12.