diff --git a/src/sourcify-chains.ts b/src/sourcify-chains.ts
index 59f620f9c..b90de1ca4 100644
--- a/src/sourcify-chains.ts
+++ b/src/sourcify-chains.ts
@@ -699,7 +699,14 @@ const sourcifyChainsExtensions: SourcifyChainsExtensionsObject = {
     contractFetchAddress: "https://goerli.basescan.org/" + ETHERSCAN_SUFFIX,
     txRegex: ETHERSCAN_REGEX,
   },
+  "888": {
+    // Wanchain Mainnet
+    supported: true,
+    monitored: false,
+    txRegex: ETHERSCAN_REGEX,
+  },
   "999": {
+    // Wanchain Testnet
     supported: true,
     monitored: false,
     txRegex: ETHERSCAN_REGEX,
diff --git a/test/chains/chain-tests.js b/test/chains/chain-tests.js
index 7b5f1a015..c661eb5e1 100644
--- a/test/chains/chain-tests.js
+++ b/test/chains/chain-tests.js
@@ -1354,6 +1354,24 @@ describe("Test Supported Chains", function () {
     "shared/withImmutables.metadata.json"
   );
 
+  // Wanchain Mainnet
+  verifyContract(
+    "0xC3649123BCa36c0c38A71bDbd2F508AB4f939f47",
+    "888",
+    "Wanchain Mainnet",
+    ["shared/1_Storage.sol"],
+    "shared/1_Storage.metadata.json"
+  );
+  verifyContractWithImmutables(
+    "0xAc7Df63C447201965222dF9675E8d4A78c3CA315",
+    "888",
+    "Wanchain Mainnet",
+    ["uint256"],
+    [888],
+    ["shared/WithImmutables.sol"],
+    "shared/withImmutables.metadata.json"
+  );
+
   // Wanchain Testnet
   verifyContract(
     "0x500E12a948E9Fc594bC6Fe86B3B270B5a67332D8",