diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 81172b1..eb7ec28 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@api.global/typedrequest-interfaces',
-  version: '3.0.11',
+  version: '3.0.12',
   description: 'interfaces for making typed requests'
 }
diff --git a/ts/index.ts b/ts/index.ts
index 6b477d3..2277764 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -96,7 +96,7 @@ export interface IUnifiedStreamDataPackage {
    * end: indicates the end of a stream
    * feedback: indicates a feedback message
    */
-  mainPurpose: 'start' | 'binaryChunk' | 'object' | 'end' | 'feedback' | 'keepAlive';
+  mainPurpose: 'start' | 'chunk' | 'object' | 'end' | 'feedback' | 'keepAlive';
 
   /**
    * the data package