diff --git a/index.d.ts b/index.d.ts
index c40f0e0..c5c7aaf 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -61,6 +61,11 @@ declare module 'monaco-editor/esm/vs/editor/editor.api' {
        */
       readonly isKubernetes?: boolean;
 
+      /**
+       * A list of custom tags.
+       */
+      readonly customTags?: string[];
+
       readonly format?: boolean;
     }
 
diff --git a/src/workerManager.ts b/src/workerManager.ts
index 0a5ecb2..18ddfed 100644
--- a/src/workerManager.ts
+++ b/src/workerManager.ts
@@ -42,6 +42,7 @@ export function createWorkerManager(
           enableSchemaRequest: defaults.diagnosticsOptions.enableSchemaRequest,
           prefix: defaults.diagnosticsOptions.prefix,
           isKubernetes: defaults.diagnosticsOptions.isKubernetes,
+          customTags: defaults.diagnosticsOptions.customTags,
         },
       });