diff --git a/src/backend/core/services/participants_management.py b/src/backend/core/services/participants_management.py
index 3b08f4530..0d0fea037 100644
--- a/src/backend/core/services/participants_management.py
+++ b/src/backend/core/services/participants_management.py
@@ -13,6 +13,7 @@ from livekit.api import (
     MuteRoomTrackRequest,
     RoomParticipantIdentity,
     TwirpError,
+    TwirpErrorCode,
     UpdateParticipantRequest,
 )
 from livekit.protocol.models import ParticipantInfo
@@ -53,7 +54,7 @@ class ParticipantsManagement:
             )
 
         except (TwirpError, TimeoutError) as e:
-            if isinstance(e, TwirpError) and e.code == "not_found":
+            if isinstance(e, TwirpError) and e.code == TwirpErrorCode.NOT_FOUND:
                 logger.warning(
                     "Participant %s not found in room %s, skipping muting",
                     identity,
@@ -96,7 +97,7 @@ class ParticipantsManagement:
                 RoomParticipantIdentity(room=room_name, identity=identity)
             )
         except (TwirpError, TimeoutError) as e:
-            if isinstance(e, TwirpError) and e.code == "not_found":
+            if isinstance(e, TwirpError) and e.code == TwirpErrorCode.NOT_FOUND:
                 logger.warning(
                     "Participant %s not found in room %s, skipping removing",
                     identity,
@@ -141,7 +142,7 @@ class ParticipantsManagement:
             )
 
         except (TwirpError, TimeoutError) as e:
-            if isinstance(e, TwirpError) and e.code == "not_found":
+            if isinstance(e, TwirpError) and e.code == TwirpErrorCode.NOT_FOUND:
                 logger.warning(
                     "Participant %s not found in room %s, skipping update",
                     identity,
@@ -204,7 +205,7 @@ class ParticipantsManagement:
                 )
             )
         except (TwirpError, TimeoutError) as e:
-            if isinstance(e, TwirpError) and e.code == "not_found":
+            if isinstance(e, TwirpError) and e.code == TwirpErrorCode.NOT_FOUND:
                 raise ParticipantNotFoundException("Participant does not exist") from e
 
             logger.exception(
diff --git a/src/backend/core/services/room_management.py b/src/backend/core/services/room_management.py
index c757becc8..c50debeb3 100644
--- a/src/backend/core/services/room_management.py
+++ b/src/backend/core/services/room_management.py
@@ -14,6 +14,7 @@ from livekit.api import (
     DeleteRoomRequest,
     ListRoomsRequest,
     TwirpError,
+    TwirpErrorCode,
     UpdateRoomMetadataRequest,
 )
 
@@ -81,7 +82,7 @@ class RoomManagement:
             )
 
         except (TwirpError, TimeoutError) as e:
-            if isinstance(e, TwirpError) and e.code == "not_found":
+            if isinstance(e, TwirpError) and e.code == TwirpErrorCode.NOT_FOUND:
                 raise RoomNotFoundException("Room does not exist") from e
 
             logger.exception(
@@ -109,7 +110,7 @@ class RoomManagement:
             await lkapi.room.delete_room(DeleteRoomRequest(room=room_name))
             logger.info("Deleted LiveKit room %s", room_name)
         except (TwirpError, TimeoutError) as e:
-            if isinstance(e, TwirpError) and e.code == "not_found":
+            if isinstance(e, TwirpError) and e.code == TwirpErrorCode.NOT_FOUND:
                 logger.warning(
                     "Room %s not found in LiveKit, skipping deletion",
                     room_name,