diff --git a/packages/web3-eth-abi/package-lock.json b/packages/web3-eth-abi/package-lock.json
index 355210bc6a6..ce6c31fdac6 100644
--- a/packages/web3-eth-abi/package-lock.json
+++ b/packages/web3-eth-abi/package-lock.json
@@ -5,9 +5,9 @@
 	"requires": true,
 	"dependencies": {
 		"@ethersproject/abi": {
-			"version": "5.0.0-beta.151",
-			"resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.0.0-beta.151.tgz",
-			"integrity": "sha512-LHAr1KagDSdx2UUmnxyKRbMIUJofJbIQdnG6qB++AGS2sXngLUo2oEpjPCuSlZS616lmzbvwKQuoN9cqXO74ZQ==",
+			"version": "5.0.0-beta.152",
+			"resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.0.0-beta.152.tgz",
+			"integrity": "sha512-+1+ukofyBYNJo8IdIK8lBENkEycgXW1ny1zWT7oYD8GKvczYYrgucRQnJPgt3u9MJYZdje4yxDQFoGd6d4BpRA==",
 			"requires": {
 				"@ethersproject/address": ">=5.0.0-beta.128",
 				"@ethersproject/bignumber": ">=5.0.0-beta.130",
@@ -81,14 +81,14 @@
 			}
 		},
 		"@ethersproject/logger": {
-			"version": "5.0.0-beta.136",
-			"resolved": "https://registry.npmjs.org/@ethersproject/logger/-/logger-5.0.0-beta.136.tgz",
-			"integrity": "sha512-baWK/4ccsVcyUU20nhp7k+hoRYsiaOfURYlyvQCoUUFKD3mpSRQCH42wxCosZZSCWz4rTHgASLQDdKkBtNVz1w=="
+			"version": "5.0.0-beta.137",
+			"resolved": "https://registry.npmjs.org/@ethersproject/logger/-/logger-5.0.0-beta.137.tgz",
+			"integrity": "sha512-H36iMhWOY+tco1+o2NZUdQT8Gc6Y9795RSPgvluatvjvyt3X6mHtWXes4F8Rc5N/95px++a/ODYVSkSmlr68+A=="
 		},
 		"@ethersproject/properties": {
-			"version": "5.0.0-beta.138",
-			"resolved": "https://registry.npmjs.org/@ethersproject/properties/-/properties-5.0.0-beta.138.tgz",
-			"integrity": "sha512-vLVftNTxonJ0SkkcMcpXHN9pABD84clh+Cz3TV79qvh+lc0MFX3dnYL1JinBdFnqLPXU9vw2LbTrBhwQY8bzCQ==",
+			"version": "5.0.0-beta.139",
+			"resolved": "https://registry.npmjs.org/@ethersproject/properties/-/properties-5.0.0-beta.139.tgz",
+			"integrity": "sha512-IFMEWxWkx8ATeGtY56pnHXK40eJgfO9UeEsK/24Qzwyl5jA5Lhz6OoElaW3UG5LLupHmLoRuLyuG1WNg2olC3A==",
 			"requires": {
 				"@ethersproject/logger": ">=5.0.0-beta.129"
 			}
diff --git a/packages/web3-eth-abi/package.json b/packages/web3-eth-abi/package.json
index fe48b1d0b6f..f71f747a065 100644
--- a/packages/web3-eth-abi/package.json
+++ b/packages/web3-eth-abi/package.json
@@ -13,7 +13,7 @@
     },
     "main": "src/index.js",
     "dependencies": {
-        "@ethersproject/abi": "5.0.0-beta.151",
+        "@ethersproject/abi": "5.0.0-beta.152",
         "underscore": "1.9.1",
         "web3-utils": "1.2.7"
     },
diff --git a/packages/web3-eth-abi/src/index.js b/packages/web3-eth-abi/src/index.js
index 9aeca508b55..739c7b0a137 100644
--- a/packages/web3-eth-abi/src/index.js
+++ b/packages/web3-eth-abi/src/index.js
@@ -99,6 +99,9 @@ ABICoder.prototype.encodeParameter = function (type, param) {
  */
 ABICoder.prototype.encodeParameters = function (types, params) {
     const bytesToEvenLength = (param) => {
+        if (Buffer.isBuffer(param)) {
+            param = utils.toHex(param)
+        }
         // bitwise AND operator returns true if odd
         if (param.length & 1) { 
             return '0x0' + param.substring(2)
@@ -106,6 +109,9 @@ ABICoder.prototype.encodeParameters = function (types, params) {
         return param
     }
     const bytes32ToFixedLength = (param) => {
+        if (Buffer.isBuffer(param)) {
+            param = utils.toHex(param)
+        }
         if (param.length < 66) { // 66 includes `0x`
             return utils.rightPad(param, 64)
         }
@@ -116,7 +122,7 @@ ABICoder.prototype.encodeParameters = function (types, params) {
         this.mapTypes(types),
         params.map(function (param, index) {
             let type = types[index]
-            if (typeof type === 'object') {
+            if (typeof type === 'object' && type.type) {
                 // We may get a named type of shape {name, type}
                 type = type.type
             }
@@ -126,19 +132,21 @@ ABICoder.prototype.encodeParameters = function (types, params) {
                 return param.toString(10);
             }
 
+            // Convert odd-length bytes to even
             if (type === 'bytes') {
                 param = bytesToEvenLength(param)
             } else if (type === 'bytes[]') {
                 param = param.map(p => bytesToEvenLength(p))
             }
 
+            // Convert bytes32 to fixed length
             if (type === 'bytes32') {
                 param = bytes32ToFixedLength(param)
             } else if (type === 'bytes32[]') {
                 param = param.map(p => bytes32ToFixedLength(p))
             }
 
-            // Format tuples for above bytes and bytes32 rules
+            // Format tuples for above rules
             if (typeof type === 'string' && type.includes('tuple')) {
                 const coder = ethersAbiCoder._getCoder(ParamType.from(type));
                 const modifyParams = (coder, param) => {
diff --git a/test/abi.encodeParameter.js b/test/abi.encodeParameter.js
index 8eeeeb9b001..dae077e5567 100644
--- a/test/abi.encodeParameter.js
+++ b/test/abi.encodeParameter.js
@@ -694,6 +694,11 @@ describe('lib/solidity/coder', function () {
             values: [new BigNumber(42), new BigNumber(42)],
             expected: '000000000000000000000000000000000000000000000000000000000000002a000000000000000000000000000000000000000000000000000000000000002a'
         });
+        test({
+            types: ['bytes', 'bytes32'],
+            values: [Buffer.from('cool'), Buffer.from('beans')],
+            expected: '00000000000000000000000000000000000000000000000000000000000000406265616e730000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004636f6f6c00000000000000000000000000000000000000000000000000000000'
+        });
     });
 });