diff --git a/target_chains/ethereum/contracts/.env.prod.shimmer_testnet b/target_chains/ethereum/contracts/.env.prod.shimmer_testnet
deleted file mode 100644
index 67d2ddec..00000000
--- a/target_chains/ethereum/contracts/.env.prod.shimmer_testnet
+++ /dev/null
@@ -1,5 +0,0 @@
-MIGRATIONS_DIR=./migrations/prod-receiver
-MIGRATIONS_NETWORK=shimmer_testnet
-WORMHOLE_CHAIN_NAME=shimmer
-CLUSTER=testnet
-VALID_TIME_PERIOD_SECONDS=60
diff --git a/target_chains/ethereum/contracts/networks/1071.json b/target_chains/ethereum/contracts/networks/1071.json
deleted file mode 100644
index 20899a2f..00000000
--- a/target_chains/ethereum/contracts/networks/1071.json
+++ /dev/null
@@ -1,16 +0,0 @@
-[
-  {
-    "contractName": "Migrations",
-    "address": "0xf5BBe9558F4Bf37F1eB82fb2CEdb1C775FA56832"
-  },
-  {
-    "contractName": "WormholeReceiver",
-    "address": "0x8250f4aF4B972684F7b336503E2D6dFeDeB1487a",
-    "transactionHash": "0xa0f9e2464c9457f370f23949000fd3cebcaf320f7c085907929dd55c000d688d"
-  },
-  {
-    "contractName": "PythUpgradable",
-    "address": "0xA2aa501b19aff244D90cc15a4Cf739D2725B5729",
-    "transactionHash": "0x52ede0289f74c69ea78bd01b0c6452884528489edf5b4144e436e6f955927531"
-  }
-]
diff --git a/target_chains/ethereum/contracts/networks/3.json b/target_chains/ethereum/contracts/networks/3.json
deleted file mode 100644
index ab61ac45..00000000
--- a/target_chains/ethereum/contracts/networks/3.json
+++ /dev/null
@@ -1,11 +0,0 @@
-[
-  {
-    "contractName": "Migrations",
-    "address": "0x1c6Cd107fB71768FBc46F8B6180Eec155C03eEb5"
-  },
-  {
-    "contractName": "PythUpgradable",
-    "address": "0xff1a0f4744e8582DF1aE09D5611b887B6a12925C",
-    "transactionHash": "0x78f8960b670a27f63a846ff99f25dc64f7c2fc8b843c7f166abe64f24a5cb87e"
-  }
-]
diff --git a/target_chains/ethereum/contracts/truffle-config.js b/target_chains/ethereum/contracts/truffle-config.js
index 17bad25f..dca8f2bc 100644
--- a/target_chains/ethereum/contracts/truffle-config.js
+++ b/target_chains/ethereum/contracts/truffle-config.js
@@ -36,16 +36,6 @@ module.exports = {
       timeoutBlocks: 200,
       skipDryRun: false,
     },
-    ropsten: {
-      provider: payerProvider(
-        `https://ropsten.infura.io/v3/` + process.env.INFURA_KEY
-      ),
-      network_id: 3,
-      gas: 5500000,
-      confirmations: 2,
-      timeoutBlocks: 200,
-      skipDryRun: true,
-    },
     rinkeby: {
       provider: payerProvider(
         `https://rinkeby.infura.io/v3/` + process.env.INFURA_KEY
@@ -204,15 +194,6 @@ module.exports = {
       provider: payerProvider(`https://zkevm-rpc.com`),
       network_id: 1101,
     },
-    shimmer_testnet: {
-      provider: payerProvider(`https://json-rpc.evm.testnet.shimmer.network`),
-      network_id: 1071,
-      verify: {
-        apiUrl: "https://explorer.evm.testnet.shimmer.network/api",
-        explorerUrl: "https://explorer.evm.testnet.shimmer.network",
-        apiKey: "there_should_be_a_dummy_value_here_to_avoid_error",
-      },
-    },
     gnosis: {
       provider: payerProvider(`https://rpc.gnosischain.com`),
       network_id: 100,
@@ -268,7 +249,7 @@ module.exports = {
       network_id: 71,
     },
     neon: {
-      provider: payerProvider("NEON_RPC_PLACEHOLDER"), // Replace this by the neon RPC node endpoint
+      provider: payerProvider("https://neon-proxy-mainnet.solana.p2p.org"),
       network_id: 245022934,
     },
     kava: {