diff --git a/src/index.test.ts b/src/index.test.ts
index 25e2c9ca..35e30eab 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -1880,6 +1880,17 @@ describe('encodeKeyName', () => {
       '0x31145577efe228036af40000a4fbbfe353124e6fa6bb7f8e088a9269df552ea2',
     );
   });
+
+  it('works for Array keys with index as `dynamicKeyParts', () => {
+    assert.deepStrictEqual(
+      encodeKeyName('MusicPlaylist[]', 2),
+      '0x03573598507fc76d82171baa336b7fd700000000000000000000000000000002',
+    );
+    assert.deepStrictEqual(
+      erc725Instance.encodeKeyName('MusicPlaylist[]', 2),
+      '0x03573598507fc76d82171baa336b7fd700000000000000000000000000000002',
+    );
+  });
 });
 
 describe('supportsInterface', () => {
diff --git a/src/lib/encodeKeyName.test.ts b/src/lib/encodeKeyName.test.ts
index 31e44922..05dfa044 100644
--- a/src/lib/encodeKeyName.test.ts
+++ b/src/lib/encodeKeyName.test.ts
@@ -38,9 +38,9 @@ describe('encodeKeyName', () => {
       expectedKey: keccak256('MyKeyName'),
     },
     {
-      keyName: 'LSP3IssuedAssets[]',
+      keyName: 'LSP12IssuedAssets[]',
       expectedKey:
-        '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+        '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
     },
     {
       keyName: 'SupportedStandards:LSP3Profile',
diff --git a/src/lib/encodeKeyName.ts b/src/lib/encodeKeyName.ts
index 7cf4c0da..ebdabdf5 100644
--- a/src/lib/encodeKeyName.ts
+++ b/src/lib/encodeKeyName.ts
@@ -26,7 +26,7 @@ import {
   padLeft,
 } from 'web3-utils';
 
-import { guessKeyTypeFromKeyName } from './utils';
+import { encodeArrayKey, guessKeyTypeFromKeyName } from './utils';
 import { DynamicKeyParts } from '../types/dynamicKeys';
 
 // https://github.com/lukso-network/LIPs/blob/main/LSPs/LSP-2-ERC725YJSONSchema.md#mapping
@@ -248,9 +248,12 @@ function encodeDynamicKeyName(
 
   switch (keyType) {
     case 'Mapping':
-      return encodeDynamicMapping(name, dynamicKeyPartsArray);
+      return encodeDynamicMapping(name, dynamicKeyPartsArray as string[]);
     case 'MappingWithGrouping':
-      return encodeDynamicMappingWithGrouping(name, dynamicKeyPartsArray);
+      return encodeDynamicMappingWithGrouping(
+        name,
+        dynamicKeyPartsArray as string[],
+      );
     default:
       throw new Error(
         `Could not encode dynamic key: ${name} of type: ${keyType}`,
@@ -295,6 +298,13 @@ export function encodeKeyName(name: string, dynamicKeyParts?: DynamicKeyParts) {
       ]);
     }
     case 'Array': // Warning: this can not correctly encode subsequent keys of array, only the initial Array key will work
+      // encode for array index
+      if (dynamicKeyParts && typeof dynamicKeyParts === 'number') {
+        return encodeArrayKey(keccak256(name), dynamicKeyParts);
+      }
+
+      // encode for array length
+      return keccak256(name);
     case 'Singleton':
       return keccak256(name);
     default:
diff --git a/src/lib/schemaParser.test.ts b/src/lib/schemaParser.test.ts
index 58960c7a..dcd8d60f 100644
--- a/src/lib/schemaParser.test.ts
+++ b/src/lib/schemaParser.test.ts
@@ -56,15 +56,19 @@ describe('schemaParser getSchema', () => {
 
       assert.deepStrictEqual(schema, {
         '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001': {
-          name: 'LSP12IssuedAssets[1]',
+          name: 'LSP12IssuedAssets[]',
           key: '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001',
+          dynamicName: 'LSP12IssuedAssets[1]',
+          dynamicKeyPart: '0x00000000000000000000000000000001',
           keyType: 'Singleton',
           valueContent: 'Address',
           valueType: 'address',
         },
         '0xdf30dba06db6a30e65354d9a64c6098600000000000000000000000000000000': {
-          name: 'AddressPermissions[0]',
+          name: 'AddressPermissions[]',
           key: '0xdf30dba06db6a30e65354d9a64c6098600000000000000000000000000000000',
+          dynamicName: 'AddressPermissions[0]',
+          dynamicKeyPart: '0x00000000000000000000000000000000',
           keyType: 'Singleton',
           valueContent: 'Address',
           valueType: 'address',
diff --git a/src/lib/schemaParser.ts b/src/lib/schemaParser.ts
index fee9f607..3cdde5ec 100644
--- a/src/lib/schemaParser.ts
+++ b/src/lib/schemaParser.ts
@@ -102,7 +102,7 @@ const findSingletonSchemaForKey = (
 const findArraySchemaForKey = (
   key: string,
   schemas: ERC725JSONSchema[],
-): ERC725JSONSchema | null => {
+): ERC725JSONSchema | DynamicNameSchema | null => {
   // Should detect:
 
   // 1. Initial key
@@ -132,7 +132,9 @@ const findArraySchemaForKey = (
   return {
     ...arraySchema,
     key,
-    name: arraySchema.name.replace('[]', `[${elementIndex}]`),
+    dynamicName: arraySchema.name.replace('[]', `[${elementIndex}]`),
+    dynamicKeyPart: `0x${key.substring(34)}`,
+    name: arraySchema.name,
     keyType: 'Singleton',
   };
 };
diff --git a/src/lib/utils.test.ts b/src/lib/utils.test.ts
index 3f994707..50693904 100644
--- a/src/lib/utils.test.ts
+++ b/src/lib/utils.test.ts
@@ -49,8 +49,8 @@ describe('utils', () => {
       // test encoding an array of address
       {
         schema: {
-          name: 'LSP3IssuedAssets[]',
-          key: '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+          name: 'LSP12IssuedAssets[]',
+          key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
           keyType: 'Array',
           valueContent: 'Address',
           valueType: 'address',
@@ -61,15 +61,15 @@ describe('utils', () => {
         ],
         encodedValue: [
           {
-            key: '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+            key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
             value: '0x00000000000000000000000000000002',
           },
           {
-            key: '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000000',
+            key: '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000000',
             value: '0xc444009d38d3046bb0cf81fa2cd295ce46a67c78',
           },
           {
-            key: '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000001',
+            key: '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001',
             value: '0x4febc3491230571f6e1829e46602e3b110215a2e',
           },
         ],
@@ -239,8 +239,8 @@ describe('utils', () => {
 
     it('should encode the array length only if passing a number', async () => {
       const schema: ERC725JSONSchema = {
-        name: 'LSP3IssuedAssets[]',
-        key: '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+        name: 'LSP12IssuedAssets[]',
+        key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
         keyType: 'Array',
         valueContent: 'Address',
         valueType: 'address',
@@ -438,8 +438,8 @@ describe('utils', () => {
   describe('encodeArrayKey', () => {
     it('should encode the array length only if passing a number', async () => {
       const schema: ERC725JSONSchema = {
-        name: 'LSP3IssuedAssets[]',
-        key: '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+        name: 'LSP12IssuedAssets[]',
+        key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
         keyType: 'Array',
         valueContent: 'Address',
         valueType: 'address',
@@ -455,8 +455,8 @@ describe('utils', () => {
   describe('encodeData', () => {
     const schemas: ERC725JSONSchema[] = [
       {
-        name: 'LSP3IssuedAssets[]',
-        key: '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+        name: 'LSP12IssuedAssets[]',
+        key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
         keyType: 'Array',
         valueContent: 'Address',
         valueType: 'address',
@@ -550,7 +550,7 @@ describe('utils', () => {
       const encodedDataWithMultipleKeys = encodeData(
         [
           {
-            keyName: 'LSP3IssuedAssets[]',
+            keyName: 'LSP12IssuedAssets[]',
             value: ['0xa3e6F38477D45727F6e6f853Cdb479b0D60c0aC9'],
           },
         ],
@@ -559,8 +559,8 @@ describe('utils', () => {
 
       assert.deepStrictEqual(encodedDataWithMultipleKeys, {
         keys: [
-          '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000000',
+          '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000000',
         ],
         values: [
           '0x00000000000000000000000000000001',
@@ -586,7 +586,7 @@ describe('utils', () => {
       const encodedDataWithMultipleKeys = encodeData(
         [
           {
-            keyName: 'LSP3IssuedAssets[]',
+            keyName: 'LSP12IssuedAssets[]',
             value: addressArray,
           },
         ],
@@ -595,18 +595,18 @@ describe('utils', () => {
 
       assert.deepStrictEqual(encodedDataWithMultipleKeys, {
         keys: [
-          '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000000',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000001',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000002',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000003',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000004',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000005',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000006',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000007',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000008',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000009',
-          '0x3a47ab5bd3a594c3a8995f8fa58d08760000000000000000000000000000000a',
+          '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000000',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000002',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000003',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000004',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000005',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000006',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000007',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000008',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000009',
+          '0x7c8c3416d6cda87cd42c71ea1843df280000000000000000000000000000000a',
         ],
         values: ['0x0000000000000000000000000000000b', ...addressArray],
       });
@@ -618,7 +618,7 @@ describe('utils', () => {
       const encodedArrayLengthKey = encodeData(
         [
           {
-            keyName: 'LSP3IssuedAssets[]',
+            keyName: 'LSP12IssuedAssets[]',
             value: length,
           },
         ],
@@ -627,7 +627,7 @@ describe('utils', () => {
 
       assert.deepStrictEqual(encodedArrayLengthKey, {
         keys: [
-          '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+          '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
         ],
         values: ['0x00000000000000000000000000000005'],
       });
@@ -647,7 +647,7 @@ describe('utils', () => {
             },
           },
           {
-            keyName: 'LSP3IssuedAssets[]',
+            keyName: 'LSP12IssuedAssets[]',
             value: [
               '0xD94353D9B005B3c0A9Da169b768a31C57844e490',
               '0xDaea594E385Fc724449E3118B2Db7E86dFBa1826',
@@ -664,9 +664,9 @@ describe('utils', () => {
       assert.deepStrictEqual(encodedMultipleKeys, {
         keys: [
           '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
-          '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000000',
-          '0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000001',
+          '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000000',
+          '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001',
           '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
         ],
         values: [
@@ -921,7 +921,7 @@ describe('utils', () => {
       },
       {
         keyType: 'Array',
-        keyName: 'LSP3IssuedAssets[]',
+        keyName: 'LSP12IssuedAssets[]',
       },
       {
         keyType: 'Mapping',
diff --git a/src/types/dynamicKeys.ts b/src/types/dynamicKeys.ts
index 19db626e..a2ab4b9f 100644
--- a/src/types/dynamicKeys.ts
+++ b/src/types/dynamicKeys.ts
@@ -2,7 +2,7 @@
 
 import { EncodeDataType } from './encodeData/JSONURL';
 
-export type DynamicKeyParts = string | string[];
+export type DynamicKeyParts = string | string[] | number;
 
 export interface DynamicKeyPartInput {
   dynamicKeyParts: DynamicKeyParts;
diff --git a/test/mockSchema.ts b/test/mockSchema.ts
index 485b778e..52174495 100644
--- a/test/mockSchema.ts
+++ b/test/mockSchema.ts
@@ -181,8 +181,8 @@ export const mockSchema: (ERC725JSONSchema & {
 
   // Case 9
   {
-    name: 'LSP3IssuedAssets[]',
-    key: '0x3a47ab5bd3a594c3a8995f8fa58d0876c96819ca4516bd76100c92462f2f9dc0',
+    name: 'LSP12IssuedAssets[]',
+    key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
     keyType: 'Array',
     valueContent: 'Address',
     valueType: 'address',