diff --git a/src/services/bedrockRelayService.js b/src/services/bedrockRelayService.js
index 0a73e115..1355dc41 100644
--- a/src/services/bedrockRelayService.js
+++ b/src/services/bedrockRelayService.js
@@ -588,6 +588,17 @@ class BedrockRelayService {
       }
     }
 
+    if (bedrockChunk.type === 'content_block_start') {
+      return {
+        type: 'content_block_start',
+        data: {
+          type: 'content_block_start',
+          index: bedrockChunk.index || 0,
+          content_block: bedrockChunk.content_block || { type: 'text', text: '' }
+        }
+      }
+    }
+
     if (bedrockChunk.type === 'content_block_delta') {
       return {
         type: 'content_block_delta',
@@ -598,6 +609,16 @@ class BedrockRelayService {
       }
     }
 
+    if (bedrockChunk.type === 'content_block_stop') {
+      return {
+        type: 'content_block_stop',
+        data: {
+          type: 'content_block_stop',
+          index: bedrockChunk.index || 0
+        }
+      }
+    }
+
     if (bedrockChunk.type === 'message_delta') {
       return {
         type: 'message_delta',