diff --git a/package.json b/package.json
index a94704d2..74ba2f0c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "revolt.js",
-    "version": "6.0.0-rc.19",
+    "version": "6.0.0-rc.20",
     "main": "dist/index.js",
     "typings": "dist/index.d.ts",
     "module": "esm/index.js",
diff --git a/src/maps/Channels.ts b/src/maps/Channels.ts
index 1f04cc44..eda15859 100644
--- a/src/maps/Channels.ts
+++ b/src/maps/Channels.ts
@@ -653,11 +653,14 @@ export class Channel {
 
     /**
      * Check whether we have a given permission in a channel
-     * @param permission Permission Name
+     * @param permission Permission Names
      * @returns Whether we have this permission
      */
-    @computed havePermission(permission: keyof typeof Permission) {
-        return bitwiseAndEq(this.permission, Permission[permission]);
+    @computed havePermission(...permission: (keyof typeof Permission)[]) {
+        return bitwiseAndEq(
+            this.permission,
+            ...permission.map((x) => Permission[x]),
+        );
     }
 }
 
diff --git a/src/maps/Members.ts b/src/maps/Members.ts
index 15f8102a..cc4d1acb 100644
--- a/src/maps/Members.ts
+++ b/src/maps/Members.ts
@@ -143,16 +143,16 @@ export class Member {
     /**
      * Check whether a member has a certain permission against a certain object
      * @param target Target object to check permissions against
-     * @param permission Permission string to check for
+     * @param permission Permission names to check for
      * @returns Whether the member has this permission
      */
     @computed hasPermission(
         target: Server | Channel,
-        permission: keyof typeof Permission,
+        ...permission: (keyof typeof Permission)[]
     ) {
         return bitwiseAndEq(
             this.getPermissions(target),
-            Permission[permission],
+            ...permission.map((x) => Permission[x]),
         );
     }
 }
diff --git a/src/maps/Servers.ts b/src/maps/Servers.ts
index 485d32fe..ff114d8d 100644
--- a/src/maps/Servers.ts
+++ b/src/maps/Servers.ts
@@ -389,11 +389,14 @@ export class Server {
 
     /**
      * Check whether we have a given permission in a server
-     * @param permission Permission Name
+     * @param permission Permission Names
      * @returns Whether we have this permission
      */
-    @computed havePermission(permission: keyof typeof Permission) {
-        return bitwiseAndEq(this.permission, Permission[permission]);
+    @computed havePermission(...permission: (keyof typeof Permission)[]) {
+        return bitwiseAndEq(
+            this.permission,
+            ...permission.map((x) => Permission[x]),
+        );
     }
 }
 
diff --git a/src/permissions/calculator.ts b/src/permissions/calculator.ts
index e72efc09..fdc6686b 100644
--- a/src/permissions/calculator.ts
+++ b/src/permissions/calculator.ts
@@ -10,10 +10,11 @@ import {
 /**
  * Check whether `b` is present in `a`
  * @param a Input A
- * @param b Input B
+ * @param b Inputs (OR'd together)
  */
-export function bitwiseAndEq(a: number, b: number) {
-    return Long.fromNumber(a).and(b).eq(b);
+export function bitwiseAndEq(a: number, ...b: number[]) {
+    const value = b.reduce((prev, cur) => prev.or(cur), Long.fromNumber(0));
+    return value.and(a).eq(value);
 }
 
 /**