diff --git a/contracts/zero-ex/generated-artifacts-zeroEx.zip b/contracts/zero-ex/generated-artifacts-zeroEx.zip
new file mode 100644
index 0000000000..82f8e70ad2
Binary files /dev/null and b/contracts/zero-ex/generated-artifacts-zeroEx.zip differ
diff --git a/packages/asset-swapper/CHANGELOG.json b/packages/asset-swapper/CHANGELOG.json
index 1ffd259a88..c735e9caf7 100644
--- a/packages/asset-swapper/CHANGELOG.json
+++ b/packages/asset-swapper/CHANGELOG.json
@@ -1,4 +1,12 @@
 [
+    {
+        "version": "16.50.0",
+        "changes": [
+            {
+                "note": "Add support for Arbitrum one mainnet".
+            }
+        ]
+    },
     {
         "version": "16.49.3",
         "changes": [
diff --git a/packages/asset-swapper/package.json b/packages/asset-swapper/package.json
index cd75a1a87f..d39a27709f 100644
--- a/packages/asset-swapper/package.json
+++ b/packages/asset-swapper/package.json
@@ -60,10 +60,11 @@
     "dependencies": {
         "@0x/assert": "^3.0.29",
         "@0x/base-contract": "^6.4.2",
-        "@0x/contract-addresses": "^6.11.0",
-        "@0x/contract-wrappers": "^13.18.5",
-        "@0x/contracts-erc20": "^3.3.25",
-        "@0x/contracts-zero-ex": "^0.30.1",
+        "@0x/contract-addresses": "^6.10.0",
+        "@0x/contract-wrappers": "^13.18.4",
+        "@0x/contracts-asset-proxy": "^3.7.19",
+        "@0x/contracts-erc20": "^3.3.24",
+        "@0x/contracts-zero-ex": "^0.30.0",
         "@0x/dev-utils": "^4.2.9",
         "@0x/json-schemas": "^6.3.0",
         "@0x/neon-router": "^0.3.1",
diff --git a/packages/asset-swapper/src/utils/market_operation_utils/constants.ts b/packages/asset-swapper/src/utils/market_operation_utils/constants.ts
index d21254876b..2c796f2292 100644
--- a/packages/asset-swapper/src/utils/market_operation_utils/constants.ts
+++ b/packages/asset-swapper/src/utils/market_operation_utils/constants.ts
@@ -62,6 +62,7 @@ function valueByChainId<T>(rest: Partial<{ [key in ChainId]: T }>, defaultValue:
         [ChainId.Fantom]: defaultValue,
         [ChainId.Optimism]: defaultValue,
         [ChainId.Arbitrum]: defaultValue,
+        [ChainId.Celo]: defaultValue,
         ...(rest || {}),
     };
 }
@@ -215,6 +216,11 @@ export const SELL_SOURCE_FILTER_BY_CHAIN_ID = valueByChainId<SourceFilters>(
             ERC20BridgeSource.CurveV2,
             ERC20BridgeSource.MultiHop,
         ]),
+        [ChainId.Arbitrum]: new SourceFilters([
+            ERC20BridgeSource.UniswapV3,
+            ERC20BridgeSource.SushiSwap,
+            ERC20BridgeSource.MultiHop,
+        ]),
     },
     new SourceFilters([]),
 );
@@ -368,6 +374,11 @@ export const BUY_SOURCE_FILTER_BY_CHAIN_ID = valueByChainId<SourceFilters>(
             ERC20BridgeSource.CurveV2,
             ERC20BridgeSource.MultiHop,
         ]),
+        [ChainId.Arbitrum]: new SourceFilters([
+            ERC20BridgeSource.UniswapV3,
+            ERC20BridgeSource.SushiSwap,
+            ERC20BridgeSource.MultiHop,
+        ]),
     },
     new SourceFilters([]),
 );
@@ -391,6 +402,7 @@ export const FEE_QUOTE_SOURCES_BY_CHAIN_ID = valueByChainId<ERC20BridgeSource[]>
         [ChainId.Arbitrum]: [ERC20BridgeSource.SushiSwap],
         [ChainId.Celo]: [ERC20BridgeSource.UbeSwap, ERC20BridgeSource.SushiSwap],
         [ChainId.Optimism]: [ERC20BridgeSource.UniswapV3],
+        [ChainId.Arbitrum]: [ERC20BridgeSource.UniswapV3, ERC20BridgeSource.SushiSwap],
     },
     [],
 );
@@ -624,6 +636,13 @@ export const OPTIMISM_TOKENS = {
     sWETH: '0x121ab82b49b2bc4c7901ca46b8277962b4350204',
 };
 
+export const ARBITRUM_TOKENS = {
+    WETH: '0x82af49447d8a07e3bd95bd0d56f35241523fbab1',
+    WBTC: '0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f',
+    USDC: '0xff970a61a04b1ca14834a43f5de4533ebddb5cc8',
+    DAI: '0xda10009cbd5d07dd0cecc66161fc93d7c9000da1',
+};
+
 export const CURVE_POOLS = {
     compound: '0xa2b47e3d5c44877cca798226b7b8118f9bfb7a56', // 0.Compound
     // 1.USDT is dead
@@ -899,7 +918,11 @@ export const DEFAULT_INTERMEDIATE_TOKENS_BY_CHAIN_ID = valueByChainId<string[]>(
             OPTIMISM_TOKENS.nETH,
             OPTIMISM_TOKENS.sWETH,
         ],
+<<<<<<< HEAD
 >>>>>>> 9d08fefa1 (Feat/synapse (#400))
+=======
+        [ChainId.Arbitrum]: [ARBITRUM_TOKENS.WETH, ARBITRUM_TOKENS.WBTC,ARBITRUM_TOKENS.USDC,ARBITRUM_TOKENS.DAI],
+>>>>>>> ebd39d2b0 (arbitrum asset swapper)
     },
     [],
 );
@@ -954,6 +977,9 @@ export const DEFAULT_TOKEN_ADJACENCY_GRAPH_BY_CHAIN_ID = valueByChainId<TokenAdj
         [ChainId.Optimism]: new TokenAdjacencyGraphBuilder({
             default: DEFAULT_INTERMEDIATE_TOKENS_BY_CHAIN_ID[ChainId.Optimism],
         }).build(),
+        [ChainId.Arbitrum]: new TokenAdjacencyGraphBuilder({
+            default: DEFAULT_INTERMEDIATE_TOKENS_BY_CHAIN_ID[ChainId.Arbitrum],
+        }).build(),
     },
     new TokenAdjacencyGraphBuilder({ default: [] }).build(),
 );
@@ -977,7 +1003,11 @@ export const NATIVE_FEE_TOKEN_BY_CHAIN_ID = valueByChainId<string>(
 >>>>>>> 602290925 (fix celo rebase)
 =======
         [ChainId.Optimism]: getContractAddressesForChainOrThrow(ChainId.Optimism).etherToken,
+<<<<<<< HEAD
 >>>>>>> a3c912c2a (feat/optimism [TKR-280] (#385))
+=======
+        [ChainId.Arbitrum]: getContractAddressesForChainOrThrow(ChainId.Arbitrum).etherToken,
+>>>>>>> ebd39d2b0 (arbitrum asset swapper)
     },
     NULL_ADDRESS,
 );
@@ -1867,7 +1897,11 @@ export const SUSHISWAP_ROUTER_BY_CHAIN_ID = valueByChainId<string>(
 >>>>>>> 6ef4d9504 (Updated Sushiswap router on CELO )
 =======
         [ChainId.Celo]: '0x1421bde4b10e8dd459b3bcb598810b1337d56842',
+<<<<<<< HEAD
 >>>>>>> 82d42eeed (address to lowercase)
+=======
+        [ChainId.Arbitrum]: '0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506',
+>>>>>>> ebd39d2b0 (arbitrum asset swapper)
     },
     NULL_ADDRESS,
 );
@@ -2160,6 +2194,10 @@ export const UNISWAPV3_CONFIG_BY_CHAIN_ID = valueByChainId(
             quoter: '0xb27308f9f90d607463bb33ea1bebb41c27ce5ab6',
             router: '0xe592427a0aece92de3edee1f18e0157c05861564',
         },
+        [ChainId.Arbitrum]: {
+            quoter: '0xb27308f9f90d607463bb33ea1bebb41c27ce5ab6',
+            router: '0xe592427a0aece92de3edee1f18e0157c05861564',
+        },
     },
     { quoter: NULL_ADDRESS, router: NULL_ADDRESS },
 );
diff --git a/packages/contract-addresses/CHANGELOG.json b/packages/contract-addresses/CHANGELOG.json
index fedfef8af5..723f08da96 100644
--- a/packages/contract-addresses/CHANGELOG.json
+++ b/packages/contract-addresses/CHANGELOG.json
@@ -1,4 +1,12 @@
 [
+    {
+        "version": "6.12.0",
+        "changes": [
+            {
+                "note": "Add Support for Arbitrum One Mainnet"
+            }
+        ]
+    },
     {
         "version": "6.11.0",
         "changes": [
diff --git a/packages/contract-addresses/addresses.json b/packages/contract-addresses/addresses.json
index 688e6ccc2c..a254039f90 100644
--- a/packages/contract-addresses/addresses.json
+++ b/packages/contract-addresses/addresses.json
@@ -544,5 +544,47 @@
             "fillQuoteTransformer": "0x3543ef833d28b7e983c293856561f21a7f089f1d",
             "positiveSlippageFeeTransformer": "0xb11e14565dfbeb702dea9bc0cb47f1a8b32f4783"
         }
+    },
+    "42161": {
+        "erc20Proxy": "0x0000000000000000000000000000000000000000",
+        "erc721Proxy": "0x0000000000000000000000000000000000000000",
+        "zrxToken": "0x0000000000000000000000000000000000000000",
+        "etherToken": "0x82af49447d8a07e3bd95bd0d56f35241523fbab1",
+        "exchangeV2": "0x0000000000000000000000000000000000000000",
+        "exchange": "0x0000000000000000000000000000000000000000",
+        "assetProxyOwner": "0x0000000000000000000000000000000000000000",
+        "zeroExGovernor": "0x0000000000000000000000000000000000000000",
+        "forwarder": "0x0000000000000000000000000000000000000000",
+        "coordinatorRegistry": "0x0000000000000000000000000000000000000000",
+        "coordinator": "0x0000000000000000000000000000000000000000",
+        "multiAssetProxy": "0x0000000000000000000000000000000000000000",
+        "staticCallProxy": "0x0000000000000000000000000000000000000000",
+        "erc1155Proxy": "0x0000000000000000000000000000000000000000",
+        "devUtils": "0x0000000000000000000000000000000000000000",
+        "zrxVault": "0x0000000000000000000000000000000000000000",
+        "staking": "0x0000000000000000000000000000000000000000",
+        "stakingProxy": "0x0000000000000000000000000000000000000000",
+        "erc20BridgeProxy": "0x0000000000000000000000000000000000000000",
+        "erc20BridgeSampler": "0x0000000000000000000000000000000000000000",
+        "chaiBridge": "0x0000000000000000000000000000000000000000",
+        "dydxBridge": "0x0000000000000000000000000000000000000000",
+        "godsUnchainedValidator": "0x0000000000000000000000000000000000000000",
+        "broker": "0x0000000000000000000000000000000000000000",
+        "chainlinkStopLimit": "0x0000000000000000000000000000000000000000",
+        "maximumGasPrice": "0x0000000000000000000000000000000000000000",
+        "dexForwarderBridge": "0x0000000000000000000000000000000000000000",
+        "exchangeProxyGovernor": "0x1fe80d5ad9464dba2d60b88e449305f184823f8a",
+        "exchangeProxy": "0xdef1c0ded9bec7f1a1670819833240f027b25eff",
+        "exchangeProxyTransformerDeployer": "0x29f80c1f685e19ae1807063eda432f431ac623d0",
+        "exchangeProxyFlashWallet": "0xdb6f1920a889355780af7570773609bd8cb1f498",
+        "exchangeProxyLiquidityProviderSandbox": "0x0000000000000000000000000000000000000000",
+        "zrxTreasury": "0x0000000000000000000000000000000000000000",
+        "transformers": {
+            "wethTransformer": "0x10e968968f49dd66a5efeebbb2edcb9c49c4fc49",
+            "payTakerTransformer": "0xae3e8cf7bf340d7084f312dfae2aa8b01c885b02",
+            "affiliateFeeTransformer": "0x05a24978471869327904ea13da3c4322128e2aaa",
+            "fillQuoteTransformer": "0x5a653323c2a47a8e1b69fb3d0f15858bfc7fe205",
+            "positiveSlippageFeeTransformer": "0xD56B9C014b45ED95e2a048A0C28121Db30265F13"
+        }
     }
 }
diff --git a/packages/contract-addresses/src/index.ts b/packages/contract-addresses/src/index.ts
index b381cd0788..3c14d3f3ef 100644
--- a/packages/contract-addresses/src/index.ts
+++ b/packages/contract-addresses/src/index.ts
@@ -57,6 +57,7 @@ export enum ChainId {
     Arbitrum = 42161,
     Celo = 42220,
     Optimism = 10,
+    Arbitrum = 42161,
 }
 
 /**
diff --git a/yarn.lock b/yarn.lock
index cd8b95d07d..d476dd7c86 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -738,6 +738,7 @@
 "@0x/contracts-asset-proxy@^3.7.19":
   version "3.7.19"
   resolved "https://registry.yarnpkg.com/@0x/contracts-asset-proxy/-/contracts-asset-proxy-3.7.19.tgz#ee621a233f4d77b439c74c5b8d70db2e1ed001c4"
+  integrity sha512-6lTgz8JdmceaSnqpJrbyKJXUIyAA2HZrXel+ZWpgMtO7qaSSQDRUcWUBwejTE588BcVxhNFQ7tHvOK3/QGnpHw==
   dependencies:
     "@0x/base-contract" "^6.4.0"
     "@0x/contracts-erc1155" "^2.1.37"