diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59766fdb2..f8be3e89c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- [#2104](https://github.com/NibiruChain/nibiru/pull/2074) - chore: update chain IDs
+
 ### Nibiru EVM
 
 - [#2119](https://github.com/NibiruChain/nibiru/pull/2119) - fix(evm): Guarantee
@@ -63,12 +65,12 @@ preparation for a second audit starting in November 2024.
   and the [related comments from @Unique-Divine and @berndartmueller](https://github.com/NibiruChain/nibiru/issues/2059#issuecomment-2408625724).
 - [#2084](https://github.com/NibiruChain/nibiru/pull/2084) - feat(evm-forge): foundry support and template for Nibiru EVM development
 - [#2086](https://github.com/NibiruChain/nibiru/pull/2086) - fix(evm-precomples):
-Fix state consistency in precompile execution by ensuring proper journaling of
-state changes in the StateDB. This pull request makes sure that state is
-committed as expected, fixes the `StateDB.Commit` to follow its guidelines more
-closely, and solves for a critical state inconsistency producible from the
-FunToken.sol precompiled contract. It also aligns the precompiles to use
-consistent setup and dynamic gas calculations, addressing the following tickets.
+  Fix state consistency in precompile execution by ensuring proper journaling of
+  state changes in the StateDB. This pull request makes sure that state is
+  committed as expected, fixes the `StateDB.Commit` to follow its guidelines more
+  closely, and solves for a critical state inconsistency producible from the
+  FunToken.sol precompiled contract. It also aligns the precompiles to use
+  consistent setup and dynamic gas calculations, addressing the following tickets.
   - <https://github.com/NibiruChain/nibiru/issues/2083>
   - <https://github.com/code-423n4/2024-10-nibiru-zenith/issues/43>
   - <https://github.com/code-423n4/2024-10-nibiru-zenith/issues/47>
diff --git a/app/appconst/appconst.go b/app/appconst/appconst.go
index cbf5d8909..25c10dafc 100644
--- a/app/appconst/appconst.go
+++ b/app/appconst/appconst.go
@@ -53,39 +53,39 @@ func RuntimeVersion() string {
 
 // EIP 155 Chain IDs exported for tests.
 const (
-	ETH_CHAIN_ID_MAINNET int64 = 7200
+	ETH_CHAIN_ID_MAINNET int64 = 6900
 
-	ETH_CHAIN_ID_TESTNET_1 int64 = 7210
-	ETH_CHAIN_ID_TESTNET_2 int64 = 7211
-	ETH_CHAIN_ID_TESTNET_3 int64 = 7212
+	ETH_CHAIN_ID_TESTNET_1 int64 = 6910
+	ETH_CHAIN_ID_TESTNET_2 int64 = 6911
+	ETH_CHAIN_ID_TESTNET_3 int64 = 6912
 
-	ETH_CHAIN_ID_DEVNET_1 int64 = 7220
-	ETH_CHAIN_ID_DEVNET_2 int64 = 7221
-	ETH_CHAIN_ID_DEVNET_3 int64 = 7222
+	ETH_CHAIN_ID_DEVNET_1 int64 = 6920
+	ETH_CHAIN_ID_DEVNET_2 int64 = 6921
+	ETH_CHAIN_ID_DEVNET_3 int64 = 6922
 
-	ETH_CHAIN_ID_LOCALNET_0 int64 = 7230
-	ETH_CHAIN_ID_LOCALNET_1 int64 = 7231
-	ETH_CHAIN_ID_LOCALNET_2 int64 = 7232
-	ETH_CHAIN_ID_LOCALNET_3 int64 = 7233
+	ETH_CHAIN_ID_LOCALNET_0 int64 = 6930
+	ETH_CHAIN_ID_LOCALNET_1 int64 = 6931
+	ETH_CHAIN_ID_LOCALNET_2 int64 = 6932
+	ETH_CHAIN_ID_LOCALNET_3 int64 = 6933
 
-	ETH_CHAIN_ID_DEFAULT int64 = 7230
+	ETH_CHAIN_ID_DEFAULT int64 = 6930
 )
 
 var knownEthChainIDMap = map[string]int64{
-	"cataclysm-1": 7200,
+	"cataclysm-1": 6900,
 
-	"nibiru-testnet-1": 7210,
-	"nibiru-testnet-2": 7211,
-	"nibiru-testnet-3": 7212,
+	"nibiru-testnet-1": 6910,
+	"nibiru-testnet-2": 6911,
+	"nibiru-testnet-3": 6912,
 
-	"nibiru-devnet-1": 7220,
-	"nibiru-devnet-2": 7221,
-	"nibiru-devnet-3": 7222,
+	"nibiru-devnet-1": 6920,
+	"nibiru-devnet-2": 6921,
+	"nibiru-devnet-3": 6922,
 
-	"nibiru-localnet-0": 7230,
-	"nibiru-localnet-1": 7231,
-	"nibiru-localnet-2": 7232,
-	"nibiru-localnet-3": 7233,
+	"nibiru-localnet-0": 6930,
+	"nibiru-localnet-1": 6931,
+	"nibiru-localnet-2": 6932,
+	"nibiru-localnet-3": 6933,
 }
 
 // GetEthChainID: Maps the given chain ID from the block's `sdk.Context` to an