diff --git a/Cargo.toml b/Cargo.toml
index aa6871e..394a75f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nova-snark"
-version = "0.20.1"
+version = "0.20.2"
 authors = ["Srinath Setty <srinath@microsoft.com>"]
 edition = "2021"
 description = "Recursive zkSNARKs without trusted setup"
diff --git a/src/spartan/pp/mod.rs b/src/spartan/pp/mod.rs
index 596aeb8..5b926ba 100644
--- a/src/spartan/pp/mod.rs
+++ b/src/spartan/pp/mod.rs
@@ -302,7 +302,7 @@ impl<G: Group> R1CSShapeSparkRepr<G> {
 }
 
 /// A type that represents the memory-checking argument
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct MemcheckProof<G: Group> {
   sc_prod: ProductArgument<G>,
@@ -685,7 +685,7 @@ impl<G: Group> MemcheckProof<G> {
 }
 
 /// A type that represents the prover's key
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct ProverKey<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> {
   pk_ee: EE::ProverKey,
@@ -695,7 +695,7 @@ pub struct ProverKey<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> {
 }
 
 /// A type that represents the verifier's key
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct VerifierKey<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> {
   num_cons: usize,
@@ -707,7 +707,7 @@ pub struct VerifierKey<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> {
 /// A succinct proof of knowledge of a witness to a relaxed R1CS instance
 /// The proof is produced using Spartan's combination of the sum-check and
 /// the commitment to a vector viewed as a polynomial commitment
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct RelaxedR1CSSNARK<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> {
   // outer sum-check
@@ -1356,6 +1356,8 @@ impl<G: Group, SC: StepCircuit<G::Scalar>> Circuit<G::Scalar> for SpartanCircuit
 }
 
 /// A type that holds Spartan's prover key
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(bound = "")]
 pub struct SpartanProverKey<G, EE>
 where
   G: Group,
@@ -1368,6 +1370,8 @@ where
 }
 
 /// A type that holds Spartan's verifier key
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(bound = "")]
 pub struct SpartanVerifierKey<G, EE>
 where
   G: Group,
@@ -1378,7 +1382,7 @@ where
 }
 
 /// A direct SNARK proving a step circuit
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct SpartanSNARK<G, EE, C>
 where
diff --git a/src/spartan/pp/product.rs b/src/spartan/pp/product.rs
index ac3975e..c3f774d 100644
--- a/src/spartan/pp/product.rs
+++ b/src/spartan/pp/product.rs
@@ -163,7 +163,7 @@ impl<G: Group> SumcheckProof<G> {
 }
 
 /// Provides a product argument using the algorithm described by Setty-Lee, 2020
-#[derive(Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct ProductArgument<G: Group> {
   comm_output_vec: Vec<Commitment<G>>,