diff --git a/Cargo.toml b/Cargo.toml
index fc39e57..d4a594a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,9 +14,8 @@ rand_new = {package="rand", version="0.8.5"}
 rand = "0.4.6"
 # rand = "0.8"
 num = "0.4"
-num-bigint = {version = "0.4", features = ["rand"]}
+num-bigint = {version = "0.4", features = ["rand", "serde"]}
 num-traits = "0.2.8"
-# blake2 = "0.10.6"
 blake-hash = {version="0.4.0", optional=true}
 blake = {version="2.0.1", optional=true}
 generic-array = "0.14"
diff --git a/src/lib.rs b/src/lib.rs
index 143ecbe..558ea7d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -205,7 +205,6 @@ pub trait FrBigIntConversion<T> {
 impl FrBigIntConversion<Fr> for Fr {
     // Note: this could probably be more efficient by converting bigint to raw repr to Fr
     fn from_bigint(bi: &BigInt) -> Fr {
-        println!("bi: {}", bi.to_string());
         Fr::from_str(&bi.to_string()).unwrap()
     }
     fn to_bigint(&self) -> BigInt {
@@ -705,7 +704,6 @@ impl DLEQProof {
         // TODO: better error handling (not assert), make it more efficient too:
         assert!(x_bigint < modulus);
 
-        // println!("modulus overflow? isn't it bigger than Fr's order: {:?}", modulus_overflowed);
         let k_bigint = rand_new::thread_rng().gen_biguint(512).to_bigint().unwrap() % &modulus;
         let k = Fl::from_bigint(&k_bigint);
 
@@ -744,7 +742,6 @@ impl DLEQProof {
         );
 
         let challenge = DLEQProof::get_challenge(&self.A, &self.B, &self.xA, &self.xB, &kA_, &kB_);
-        println!("got challenge: {:?} which should equal {:?}", challenge, self.challenge);
 
         return challenge == self.challenge;
 
@@ -789,7 +786,6 @@ mod tests {
         let mut rng = rand_new::thread_rng();
         let x = Fl::from_bigint(&rng.gen_biguint(512).to_bigint().unwrap());
         let proof = DLEQProof::new(x, point_A, point_B).unwrap();
-        println!("proof: {:?}", proof.verify());
         assert!(proof.verify());
     }
     #[test]