diff --git a/src/managers/AutoModerationRuleManager.js b/src/managers/AutoModerationRuleManager.js
index c3976fc..c6dd339 100644
--- a/src/managers/AutoModerationRuleManager.js
+++ b/src/managers/AutoModerationRuleManager.js
@@ -75,6 +75,7 @@ class AutoModerationRuleManager extends CachedManager {
    * @typedef {Object} AutoModerationActionMetadataOptions
    * @property {GuildTextChannelResolvable|ThreadChannel} [channel] The channel to which content will be logged
    * @property {number} [durationSeconds] The timeout duration in seconds
+   * @property {string} [customMessage] The custom message that is shown whenever a message is blocked
    */
 
   /**
@@ -133,6 +134,7 @@ class AutoModerationRuleManager extends CachedManager {
           metadata: {
             duration_seconds: action.metadata?.durationSeconds,
             channel_id: action.metadata?.channel && this.guild.channels.resolveId(action.metadata.channel),
+            custom_message: action.metadata?.customMessage,
           },
         })),
         enabled,
@@ -195,6 +197,7 @@ class AutoModerationRuleManager extends CachedManager {
             metadata: {
               duration_seconds: action.metadata?.durationSeconds,
               channel_id: action.metadata?.channel && this.guild.channels.resolveId(action.metadata.channel),
+              custom_message: action.metadata?.customMessage,
             },
           })),
           enabled,
diff --git a/src/structures/AutoModerationRule.js b/src/structures/AutoModerationRule.js
index 1ec7b06..2c287c6 100644
--- a/src/structures/AutoModerationRule.js
+++ b/src/structures/AutoModerationRule.js
@@ -103,6 +103,7 @@ class AutoModerationRule extends Base {
        * @typedef {Object} AutoModerationActionMetadata
        * @property {?Snowflake} channelId The id of the channel to which content will be logged
        * @property {?number} durationSeconds The timeout duration in seconds
+       * @property {?string} customMessage The custom message that is shown whenever a message is blocked
        */
 
       /**
@@ -114,6 +115,7 @@ class AutoModerationRule extends Base {
         metadata: {
           durationSeconds: action.metadata.duration_seconds ?? null,
           channelId: action.metadata.channel_id ?? null,
+          customMessage: action.metadata.custom_message ?? null,
         },
       }));
     }
diff --git a/typings/index.d.ts b/typings/index.d.ts
index 3075d20..49601a0 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -5383,6 +5383,7 @@ export interface AutoModerationAction {
 export interface AutoModerationActionMetadata {
   channelId: Snowflake | null;
   durationSeconds: number | null;
+  customMessage: string | null;
 }
 
 export interface AutoModerationTriggerMetadata {
diff --git a/typings/rawDataTypes.d.ts b/typings/rawDataTypes.d.ts
index f65c1da..3502d82 100644
--- a/typings/rawDataTypes.d.ts
+++ b/typings/rawDataTypes.d.ts
@@ -248,6 +248,7 @@ export interface APIAutoModerationAction {
 export interface APIAutoModerationActionMetadata {
   channel_id?: Snowflake;
   duration_seconds?: number;
+  custom_message?: string;
 }
 
 export interface APIAutoModerationRule {