diff --git a/crypto/evrf/src/lib.rs b/crypto/evrf/src/lib.rs
index b321e5dd..4561f106 100644
--- a/crypto/evrf/src/lib.rs
+++ b/crypto/evrf/src/lib.rs
@@ -185,7 +185,7 @@ impl Evrf {
   pub fn prove<C: EvrfCurve>(
     rng: &mut (impl RngCore + CryptoRng),
     generators: &Generators<C>,
-    evrf_private_key: <<C as EvrfCurve>::EmbeddedCurve as Ciphersuite>::F,
+    evrf_private_key: Zeroizing<<<C as EvrfCurve>::EmbeddedCurve as Ciphersuite>::F>,
     invocation: [u8; 32],
     quantity: usize,
   ) -> Result<EvrfProveResult<C>, AcError>
@@ -202,7 +202,7 @@ impl Evrf {
     let transcript = Blake2s256::digest(
       [
         invocation.as_slice(),
-        (<<C as EvrfCurve>::EmbeddedCurve as Ciphersuite>::generator() * evrf_private_key)
+        (<<C as EvrfCurve>::EmbeddedCurve as Ciphersuite>::generator() * *evrf_private_key)
           .to_bytes()
           .as_ref(),
       ]
@@ -303,7 +303,7 @@ impl Evrf {
         generator_tables.push(GeneratorTable::new(&curve_spec, x, y));
       }
 
-      let dh = generator * evrf_private_key;
+      let dh = generator * *evrf_private_key;
       {
         for coefficient in &dlog {
           let mut coefficient = *coefficient;
diff --git a/crypto/evrf/src/tests.rs b/crypto/evrf/src/tests.rs
index b13112d8..a4c1c003 100644
--- a/crypto/evrf/src/tests.rs
+++ b/crypto/evrf/src/tests.rs
@@ -2,7 +2,7 @@ use std::time::Instant;
 
 use rand_core::OsRng;
 
-use zeroize::Zeroize;
+use zeroize::{Zeroize, Zeroizing};
 use generic_array::typenum::{Sum, Diff, Quot, U, U1, U2};
 use blake2::{Digest, Blake2b512};
 
@@ -66,9 +66,10 @@ impl EvrfCurve for Pallas {
 #[test]
 fn pasta_test() {
   let generators = generators(1024);
-  let vesta_private_key = <Vesta as Ciphersuite>::F::random(&mut OsRng);
+  let vesta_private_key = Zeroizing::new(<Vesta as Ciphersuite>::F::random(&mut OsRng));
   let time = Instant::now();
-  let res = Evrf::prove::<Pallas>(&mut OsRng, &generators, vesta_private_key, [0; 32], 1).unwrap();
+  let res =
+    Evrf::prove::<Pallas>(&mut OsRng, &generators, vesta_private_key.clone(), [0; 32], 1).unwrap();
   println!("Proving time: {:?}", Instant::now() - time);
 
   let time = Instant::now();
@@ -77,7 +78,7 @@ fn pasta_test() {
     &mut OsRng,
     &generators,
     &mut verifier,
-    Vesta::generator() * vesta_private_key,
+    Vesta::generator() * *vesta_private_key,
     [0; 32],
     1,
     &res.proof,