diff --git a/samples/client/angular/projects/contact/src/server.ts b/samples/client/angular/projects/contact/src/server.ts
index 9d3fa772..9faf3368 100644
--- a/samples/client/angular/projects/contact/src/server.ts
+++ b/samples/client/angular/projects/contact/src/server.ts
@@ -61,7 +61,7 @@ app.post('/a2a', (req, res) => {
             {
               kind: 'data',
               data: clientEvent,
-              metadata: { 'mimeType': 'application/json+a2aui' },
+              metadata: { 'mimeType': 'application/json+a2ui' },
             } as Part,
           ],
           kind: 'message',
diff --git a/samples/client/angular/projects/restaurant/src/server.ts b/samples/client/angular/projects/restaurant/src/server.ts
index d1cab0c3..5cb6043c 100644
--- a/samples/client/angular/projects/restaurant/src/server.ts
+++ b/samples/client/angular/projects/restaurant/src/server.ts
@@ -61,7 +61,7 @@ app.post('/a2a', (req, res) => {
             {
               kind: 'data',
               data: clientEvent,
-              metadata: { 'mimeType': 'application/json+a2aui' },
+              metadata: { 'mimeType': 'application/json+a2ui' },
             } as Part,
           ],
           kind: 'message',