diff --git a/examples/README.md b/examples/README.md
index 4315d205..0dc1743f 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -1,25 +1,33 @@
 # Examples
 
 ## fetchData
+
 ```
 npm run fetchData
 ```
+
 [![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/edit/erc725js-fetch-data?devtoolsheight=66&file=index.js)
 
 ## getData
+
 ```
 npm run getData
 ```
+
 [![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/edit/erc725js-get-data?devtoolsheight=66&file=package.json)
 
 ## encodeData
+
 ```
 npm run encodeData
 ```
+
 [![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/edit/erc725js-encode-data?devtoolsheight=66&file=index.js)
 
 ## decodeData
+
 ```
 npm run decodeData
 ```
+
 [![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/edit/erc725js-decode-data?devtoolsheight=66)
diff --git a/src/constants/constants.ts b/src/constants/constants.ts
index 1c71a5c0..b2e02f1e 100644
--- a/src/constants/constants.ts
+++ b/src/constants/constants.ts
@@ -155,27 +155,28 @@ export const HASH_FUNCTIONS: {
 // prettier-ignore
 export const LSP6_DEFAULT_PERMISSIONS = {
   CHANGEOWNER                      :"0x0000000000000000000000000000000000000000000000000000000000000001",
-	ADDCONTROLLER                   :"0x0000000000000000000000000000000000000000000000000000000000000002",
-	EDITPERMISSIONS                :"0x0000000000000000000000000000000000000000000000000000000000000004",
-	ADDEXTENSIONS                    :"0x0000000000000000000000000000000000000000000000000000000000000008",
-	CHANGEEXTENSIONS                 :"0x0000000000000000000000000000000000000000000000000000000000000010",
-	ADDUNIVERSALRECEIVERDELEGATE     :"0x0000000000000000000000000000000000000000000000000000000000000020",
-	CHANGEUNIVERSALRECEIVERDELEGATE  :"0x0000000000000000000000000000000000000000000000000000000000000040",
-	REENTRANCY                       :"0x0000000000000000000000000000000000000000000000000000000000000080",
-	SUPER_TRANSFERVALUE              :"0x0000000000000000000000000000000000000000000000000000000000000100",
-	TRANSFERVALUE                    :"0x0000000000000000000000000000000000000000000000000000000000000200",
-	SUPER_CALL                       :"0x0000000000000000000000000000000000000000000000000000000000000400",
-	CALL                             :"0x0000000000000000000000000000000000000000000000000000000000000800",
-	SUPER_STATICCALL                 :"0x0000000000000000000000000000000000000000000000000000000000001000",
-	STATICCALL                       :"0x0000000000000000000000000000000000000000000000000000000000002000",
-	SUPER_DELEGATECALL               :"0x0000000000000000000000000000000000000000000000000000000000004000",
-	DELEGATECALL                     :"0x0000000000000000000000000000000000000000000000000000000000008000",
-	DEPLOY                           :"0x0000000000000000000000000000000000000000000000000000000000010000",
-	SUPER_SETDATA                    :"0x0000000000000000000000000000000000000000000000000000000000020000",
-	SETDATA                          :"0x0000000000000000000000000000000000000000000000000000000000040000",
-	ENCRYPT                          :"0x0000000000000000000000000000000000000000000000000000000000080000",
-	DECRYPT                          :"0x0000000000000000000000000000000000000000000000000000000000100000",
-	SIGN                             :"0x0000000000000000000000000000000000000000000000000000000000200000",
+  ADDCONTROLLER                    :"0x0000000000000000000000000000000000000000000000000000000000000002",
+  EDITPERMISSIONS                  :"0x0000000000000000000000000000000000000000000000000000000000000004",
+  ADDEXTENSIONS                    :"0x0000000000000000000000000000000000000000000000000000000000000008",
+  CHANGEEXTENSIONS                 :"0x0000000000000000000000000000000000000000000000000000000000000010",
+  ADDUNIVERSALRECEIVERDELEGATE     :"0x0000000000000000000000000000000000000000000000000000000000000020",
+  CHANGEUNIVERSALRECEIVERDELEGATE  :"0x0000000000000000000000000000000000000000000000000000000000000040",
+  REENTRANCY                       :"0x0000000000000000000000000000000000000000000000000000000000000080",
+  SUPER_TRANSFERVALUE              :"0x0000000000000000000000000000000000000000000000000000000000000100",
+  TRANSFERVALUE                    :"0x0000000000000000000000000000000000000000000000000000000000000200",
+  SUPER_CALL                       :"0x0000000000000000000000000000000000000000000000000000000000000400",
+  CALL                             :"0x0000000000000000000000000000000000000000000000000000000000000800",
+  SUPER_STATICCALL                 :"0x0000000000000000000000000000000000000000000000000000000000001000",
+  STATICCALL                       :"0x0000000000000000000000000000000000000000000000000000000000002000",
+  SUPER_DELEGATECALL               :"0x0000000000000000000000000000000000000000000000000000000000004000",
+  DELEGATECALL                     :"0x0000000000000000000000000000000000000000000000000000000000008000",
+  DEPLOY                           :"0x0000000000000000000000000000000000000000000000000000000000010000",
+  SUPER_SETDATA                    :"0x0000000000000000000000000000000000000000000000000000000000020000",
+  SETDATA                          :"0x0000000000000000000000000000000000000000000000000000000000040000",
+  ENCRYPT                          :"0x0000000000000000000000000000000000000000000000000000000000080000",
+  DECRYPT                          :"0x0000000000000000000000000000000000000000000000000000000000100000",
+  SIGN                             :"0x0000000000000000000000000000000000000000000000000000000000200000",
+  EXECUTE_RELAY_CALL               :"0x00000000000000000000000000000000000000000000000000000000004400000",
 };
 
 export const LSP6_ALL_PERMISSIONS =
diff --git a/src/index.test.ts b/src/index.test.ts
index 568d2dc5..36d077e4 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -1060,6 +1060,7 @@ describe('Running @erc725/erc725.js tests...', () => {
           ENCRYPT: true,
           DECRYPT: true,
           SIGN: true,
+          EXECUTE_RELAY_CALL: false,
         },
         hex: '0x00000000000000000000000000000000000000000000000000000000003f3f7f',
       },
@@ -1087,6 +1088,7 @@ describe('Running @erc725/erc725.js tests...', () => {
           ENCRYPT: false,
           DECRYPT: false,
           SIGN: false,
+          EXECUTE_RELAY_CALL: false,
         },
         hex: '0x0000000000000000000000000000000000000000000000000000000000000000',
       },
@@ -1114,6 +1116,7 @@ describe('Running @erc725/erc725.js tests...', () => {
           ENCRYPT: false,
           DECRYPT: false,
           SIGN: true,
+          EXECUTE_RELAY_CALL: false,
         },
         hex: '0x0000000000000000000000000000000000000000000000000000000000200a00',
       },
@@ -1141,6 +1144,7 @@ describe('Running @erc725/erc725.js tests...', () => {
           ENCRYPT: false,
           DECRYPT: false,
           SIGN: false,
+          EXECUTE_RELAY_CALL: false,
         },
         hex: '0x0000000000000000000000000000000000000000000000000000000000040800',
       },
@@ -1168,6 +1172,7 @@ describe('Running @erc725/erc725.js tests...', () => {
           ENCRYPT: false,
           DECRYPT: false,
           SIGN: false,
+          EXECUTE_RELAY_CALL: false,
         },
         hex: '0x0000000000000000000000000000000000000000000000000000000000040004',
       },
@@ -1195,6 +1200,7 @@ describe('Running @erc725/erc725.js tests...', () => {
           ENCRYPT: false,
           DECRYPT: false,
           SIGN: false,
+          EXECUTE_RELAY_CALL: false,
         },
         hex: '0x0000000000000000000000000000000000000000000000000000000000000a00',
       },
@@ -1275,6 +1281,7 @@ describe('Running @erc725/erc725.js tests...', () => {
             ENCRYPT: true,
             DECRYPT: true,
             SIGN: true,
+            EXECUTE_RELAY_CALL: true,
           },
         );
         assert.deepStrictEqual(
@@ -1304,6 +1311,7 @@ describe('Running @erc725/erc725.js tests...', () => {
             ENCRYPT: true,
             DECRYPT: true,
             SIGN: true,
+            EXECUTE_RELAY_CALL: true,
           },
         );
       });
diff --git a/src/index.ts b/src/index.ts
index 2acbb8d1..6a07e404 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -428,7 +428,7 @@ export class ERC725 {
   static encodePermissions(permissions: Permissions): string {
     const result = Object.keys(permissions).reduce((previous, key) => {
       return permissions[key]
-        ? previous + Number(hexToNumber(LSP6_DEFAULT_PERMISSIONS[key]))
+        ? previous | Number(hexToNumber(LSP6_DEFAULT_PERMISSIONS[key]))
         : previous;
     }, 0);
 
@@ -477,6 +477,7 @@ export class ERC725 {
       ENCRYPT: false,
       DECRYPT: false,
       SIGN: false,
+      EXECUTE_RELAY_CALL: false,
     };
 
     const permissionsToTest = Object.keys(LSP6_DEFAULT_PERMISSIONS);
diff --git a/src/types/Method.ts b/src/types/Method.ts
index 658bde75..e28b49ab 100644
--- a/src/types/Method.ts
+++ b/src/types/Method.ts
@@ -48,4 +48,5 @@ export interface Permissions {
   ENCRYPT?: boolean;
   DECRYPT?: boolean;
   SIGN?: boolean;
+  EXECUTE_RELAY_CALL?: boolean;
 }