diff --git a/openhands/events/stream.py b/openhands/events/stream.py
index 8a6cdfb35ae2..ca1025d0f163 100644
--- a/openhands/events/stream.py
+++ b/openhands/events/stream.py
@@ -384,7 +384,7 @@ def get_matching_events(
         start_id: int = 0,
         limit: int = 100,
         reverse: bool = False,
-    ) -> list:
+    ) -> list[type[Event]]:
         """Get matching events from the event stream based on filters.
 
         Args:
@@ -414,7 +414,7 @@ def get_matching_events(
             ):
                 continue
 
-            matching_events.append(event_to_dict(event))
+            matching_events.append(event)
 
             # Stop if we have enough events
             if len(matching_events) >= limit:
diff --git a/openhands/server/routes/conversation.py b/openhands/server/routes/conversation.py
index c0cef6c4ae01..b91c8070b56f 100644
--- a/openhands/server/routes/conversation.py
+++ b/openhands/server/routes/conversation.py
@@ -3,7 +3,7 @@
 
 from openhands.core.logger import openhands_logger as logger
 from openhands.events.event import Event
-from openhands.events.serialization.event import event_from_dict
+from openhands.events.serialization.event import event_from_dict, event_to_dict
 from openhands.runtime.base import Runtime
 
 app = APIRouter(prefix='/api/conversations/{conversation_id}')
@@ -156,6 +156,8 @@ async def search_events(
     has_more = len(matching_events) > limit
     if has_more:
         matching_events = matching_events[:limit]  # Remove the extra event
+
+    matching_events = [event_to_dict(event) for event in matching_events]
     return {
         'events': matching_events,
         'has_more': has_more,