diff --git a/chatgpt/stream_v1.py b/chatgpt/stream_v1.py
index 43dcb85..ad45b47 100644
--- a/chatgpt/stream_v1.py
+++ b/chatgpt/stream_v1.py
@@ -11,45 +11,56 @@ async def transform_delta_stream(input_stream) -> AsyncGenerator[str, None]:
     current_o = None
     current_p = None
 
-    async for line in input_stream:
-        line = line.decode("utf-8").strip()
-        if not line:
-            continue
-
-        if line.startswith("event: "):
-            next_is_delta = True
-            continue
-
-        if line.startswith("data: ") and next_is_delta:
-            data = line[6:]
-
-            if data == "[DONE]":
-                yield line
+    try:
+        async for line in input_stream:
+            line = line.decode("utf-8").strip()
+            if not line:
                 continue
 
-            try:
-                json_data = json.loads(data)
+            if line.startswith("event: "):
+                next_is_delta = True
+                continue
 
-                if 'c' in json_data:
-                    current_c = json_data['c']
-                    if 'v' in json_data and isinstance(json_data['v'], dict):
-                        current_documents[current_c] = json_data['v']
-                        yield f'data: {json.dumps(current_documents[current_c])}'
+            if line.startswith("data: ") and next_is_delta:
+                data = line[6:]
+
+                if data == "[DONE]":
+                    yield line
                     continue
 
-                if 'v' in json_data:
-                    if 'p' in json_data:
-                        current_p = json_data['p']
-                    if 'o' in json_data:
-                        current_o = json_data['o']
-                    if current_c is not None and current_c in current_documents:
-                        apply_patch(current_documents, current_p, current_o, json_data['v'], current_c)
+                try:
+                    json_data = json.loads(data)
 
-                yield f'data: {json.dumps(current_documents[current_c])}'
-            except:
+                    if 'c' in json_data:
+                        current_c = json_data['c']
+                        if 'v' in json_data and isinstance(json_data['v'], dict):
+                            current_documents[current_c] = json_data['v']
+                            yield f'data: {json.dumps(current_documents[current_c])}'
+                        continue
+
+                    if 'v' in json_data:
+                        if 'p' in json_data:
+                            current_p = json_data['p']
+                        if 'o' in json_data:
+                            current_o = json_data['o']
+                        if current_c is not None and current_c in current_documents:
+                            apply_patch(current_documents, current_p, current_o, json_data['v'], current_c)
+
+                    yield f'data: {json.dumps(current_documents[current_c])}'
+                except Exception as e:
+                    logging.error(f"Error processing JSON data: {e}")
+                    yield line
+            else:
                 yield line
-        else:
-            yield line
+    except GeneratorExit:
+        raise
+    finally:
+        if hasattr(input_stream, 'aclose') and callable(input_stream.aclose):
+            try:
+                await input_stream.aclose()
+            except Exception as e:
+                logging.error(f"Error closing input_stream: {e}")
+
 
 def apply_patch(document, p, o, v, c):
     if o == 'patch':
diff --git a/version.txt b/version.txt
index b18246b..e9d84b6 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.9.0-beta4
\ No newline at end of file
+1.9.0-beta5
\ No newline at end of file