diff --git a/packages/rln/src/credentials_manager.ts b/packages/rln/src/credentials_manager.ts
index 1cf0495d59..498f298830 100644
--- a/packages/rln/src/credentials_manager.ts
+++ b/packages/rln/src/credentials_manager.ts
@@ -187,7 +187,7 @@ export class RLNCredentialsManager {
     const currentChainId = await signer.getChainId();
     log.info(`Current chain ID: ${currentChainId}`);
 
-    if (chainId && chainId !== currentChainId) {
+    if (chainId && chainId !== currentChainId.toString()) {
       log.error(
         `Chain ID mismatch: contract=${chainId}, current=${currentChainId}`
       );
@@ -260,7 +260,7 @@ export class RLNCredentialsManager {
     const chainId = credentials.membership.chainId;
     const network = await this.contract.provider.getNetwork();
     const currentChainId = network.chainId;
-    if (chainId !== currentChainId) {
+    if (chainId !== currentChainId.toString()) {
       throw Error(
         `Failed to verify chain coordinates: credentials chainID=${chainId} is not equal to registryContract chainID=${currentChainId}`
       );