diff --git a/node_modules/@openzeppelin/upgrades-core/dist/provider.js b/node_modules/@openzeppelin/upgrades-core/dist/provider.js
index 1fd10da..d80cf45 100644
--- a/node_modules/@openzeppelin/upgrades-core/dist/provider.js
+++ b/node_modules/@openzeppelin/upgrades-core/dist/provider.js
@@ -33,14 +33,14 @@ async function getTransactionByHash(provider, txHash) {
     return provider.send('eth_getTransactionByHash', [txHash]);
 }
 exports.getTransactionByHash = getTransactionByHash;
-exports.networkNames = Object.freeze({
+exports.networkNames = {
     1: 'mainnet',
     2: 'morden',
     3: 'ropsten',
     4: 'rinkeby',
     5: 'goerli',
     42: 'kovan',
-});
+};
 async function isDevelopmentNetwork(provider) {
     const chainId = await getChainId(provider);
     //  1337 => ganache and geth --dev