diff --git a/hardhat.config.ts b/hardhat.config.ts
index 97debbd1..2b146f5b 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -20,10 +20,6 @@ const chainIds = {
   ganache: 1337,
   goerli: 5,
   hardhat: 31337,
-  kovan: 42,
-  mainnet: 1,
-  rinkeby: 4,
-  ropsten: 3,
   avalanche: 43114,
   polygon: 137,
   arbitrum: 42161,