diff --git a/plonk-wasm/src/pasta_fp_plonk_index.rs b/plonk-wasm/src/pasta_fp_plonk_index.rs
index cdf31eebd14..c9584699f28 100644
--- a/plonk-wasm/src/pasta_fp_plonk_index.rs
+++ b/plonk-wasm/src/pasta_fp_plonk_index.rs
@@ -1,4 +1,5 @@
 use ark_poly::EvaluationDomain;
+use base64::{engine::general_purpose, Engine};
 use kimchi::circuits::lookup::runtime_tables::RuntimeTableCfg;
 
 use crate::{
@@ -270,7 +271,7 @@ pub fn caml_pasta_fp_plonk_index_write(
 #[wasm_bindgen]
 pub fn caml_pasta_fp_plonk_index_serialize(index: &WasmPastaFpPlonkIndex) -> String {
     let serialized = rmp_serde::to_vec(&index.0).unwrap();
-    base64::encode(serialized)
+    general_purpose::STANDARD.encode(serialized)
 }
 
 // helpers
diff --git a/plonk-wasm/src/pasta_fq_plonk_index.rs b/plonk-wasm/src/pasta_fq_plonk_index.rs
index 2993b4ec25a..4ad2dbd39d4 100644
--- a/plonk-wasm/src/pasta_fq_plonk_index.rs
+++ b/plonk-wasm/src/pasta_fq_plonk_index.rs
@@ -1,4 +1,5 @@
 use ark_poly::EvaluationDomain;
+use base64::{engine::general_purpose, Engine};
 use kimchi::circuits::lookup::runtime_tables::RuntimeTableCfg;
 
 use crate::{
@@ -269,5 +270,5 @@ pub fn caml_pasta_fq_plonk_index_write(
 #[wasm_bindgen]
 pub fn caml_pasta_fq_plonk_index_serialize(index: &WasmPastaFqPlonkIndex) -> String {
     let serialized = rmp_serde::to_vec(&index.0).unwrap();
-    base64::encode(serialized)
+    general_purpose::STANDARD.encode(serialized)
 }
diff --git a/plonk-wasm/src/plonk_proof.rs b/plonk-wasm/src/plonk_proof.rs
index a067317cb54..164751b6a4e 100644
--- a/plonk-wasm/src/plonk_proof.rs
+++ b/plonk-wasm/src/plonk_proof.rs
@@ -4,6 +4,7 @@ use crate::{
 };
 use ark_ec::AffineRepr;
 use ark_ff::One;
+use base64::{engine::general_purpose, Engine};
 use core::{array, convert::TryInto};
 use groupmap::GroupMap;
 use kimchi::{
@@ -618,7 +619,7 @@ macro_rules! impl_proof {
                 pub fn serialize(&self) -> String {
                     let (proof, _public_input) = self.into();
                     let serialized = rmp_serde::to_vec(&proof).unwrap();
-                    base64::encode(serialized)
+                    general_purpose::STANDARD.encode(serialized)
                 }
             }