diff --git a/bindings/wasm/src/credential/revocation/status_list_2021/credential.rs b/bindings/wasm/src/credential/revocation/status_list_2021/credential.rs
index 290dd2085b..d440dc8814 100644
--- a/bindings/wasm/src/credential/revocation/status_list_2021/credential.rs
+++ b/bindings/wasm/src/credential/revocation/status_list_2021/credential.rs
@@ -127,7 +127,7 @@ impl WasmStatusList2021Credential {
   pub fn set_credential_status(
     &mut self,
     credential: &mut WasmCredential,
-    index: &str,
+    index: usize,
     revoked_or_suspended: bool,
   ) -> Result<WasmStatusList2021Entry> {
     let entry = self
diff --git a/bindings/wasm/src/credential/revocation/status_list_2021/entry.rs b/bindings/wasm/src/credential/revocation/status_list_2021/entry.rs
index 7bec56cd7d..32194ceade 100644
--- a/bindings/wasm/src/credential/revocation/status_list_2021/entry.rs
+++ b/bindings/wasm/src/credential/revocation/status_list_2021/entry.rs
@@ -21,7 +21,7 @@ impl WasmStatusList2021Entry {
   pub fn new(
     status_list: &str,
     purpose: WasmStatusPurpose,
-    index: &str,
+    index: usize,
     id: Option<String>,
   ) -> Result<WasmStatusList2021Entry> {
     let status_list = Url::parse(status_list).map_err(|e| JsError::new(&e.to_string()))?;
diff --git a/examples/1_advanced/8_status_list_2021.rs b/examples/1_advanced/8_status_list_2021.rs
index 73da986343..0a70690e91 100644
--- a/examples/1_advanced/8_status_list_2021.rs
+++ b/examples/1_advanced/8_status_list_2021.rs
@@ -100,7 +100,7 @@ async fn main() -> anyhow::Result<()> {
 
   // Create an unsigned `UniversityDegree` credential for Alice.
   // The issuer also chooses a unique `StatusList2021` index to be able to revoke it later.
-  let credential_index: &str = "420";
+  let credential_index: usize = 420;
   let status: Status = StatusList2021Entry::new(
     status_list_credential.id().cloned().unwrap(),
     status_list_credential.purpose(),
diff --git a/identity_credential/src/revocation/status_list_2021/credential.rs b/identity_credential/src/revocation/status_list_2021/credential.rs
index 9bd398b4c1..9f6958abf9 100644
--- a/identity_credential/src/revocation/status_list_2021/credential.rs
+++ b/identity_credential/src/revocation/status_list_2021/credential.rs
@@ -128,17 +128,17 @@ impl StatusList2021Credential {
   pub fn set_credential_status(
     &mut self,
     credential: &mut Credential,
-    index: &str,
+    index: usize,
     revoked_or_suspended: bool,
   ) -> Result<StatusList2021Entry, StatusList2021CredentialError> {
     let id = self
       .id()
       .cloned()
       .ok_or(StatusList2021CredentialError::Unreferenceable)?;
+
     let entry = StatusList2021Entry::new(id, self.purpose(), index, None);
-    let index_int = index.parse::<usize>().expect("should be integer serialized as string");
 
-    self.set_entry(index_int, revoked_or_suspended)?;
+    self.set_entry(index, revoked_or_suspended)?;
     credential.credential_status = Some(entry.clone().into());
 
     Ok(entry)
diff --git a/identity_credential/src/revocation/status_list_2021/entry.rs b/identity_credential/src/revocation/status_list_2021/entry.rs
index 3cf98501a1..cd8c583a3a 100644
--- a/identity_credential/src/revocation/status_list_2021/entry.rs
+++ b/identity_credential/src/revocation/status_list_2021/entry.rs
@@ -66,7 +66,7 @@ impl From<StatusList2021Entry> for Status {
 
 impl StatusList2021Entry {
   /// Creates a new [`StatusList2021Entry`].
-  pub fn new(status_list: Url, purpose: StatusPurpose, index: impl Into<String>, id: Option<Url>) -> Self {
+  pub fn new(status_list: Url, purpose: StatusPurpose, index: usize, id: Option<Url>) -> Self {
     let id = id.unwrap_or_else(|| {
       let mut id = status_list.clone();
       id.set_fragment(None);
@@ -78,7 +78,7 @@ impl StatusList2021Entry {
       type_: CREDENTIAL_STATUS_TYPE.to_owned(),
       status_purpose: purpose,
       status_list_credential: status_list,
-      status_list_index: index.into(),
+      status_list_index: index.to_string(),
     }
   }
 
@@ -123,7 +123,7 @@ mod tests {
     let status = StatusList2021Entry::new(
       Url::parse("https://example.com/credentials/status/3").unwrap(),
       StatusPurpose::Revocation,
-      "94567",
+      94567,
       Url::parse("https://example.com/credentials/status/3#94567").ok(),
     );
     assert_eq!(status, deserialized);