diff --git a/mataserver/streaming/session.py b/mataserver/streaming/session.py
index 41abe20..620f736 100644
--- a/mataserver/streaming/session.py
+++ b/mataserver/streaming/session.py
@@ -4,7 +4,15 @@
 import time
 import uuid
 from dataclasses import dataclass, field
-from enum import StrEnum
+import sys
+
+if sys.version_info >= (3, 11):
+    from enum import StrEnum
+else:
+    from enum import Enum
+
+    class StrEnum(str, Enum):
+        pass
 
 
 class FramePolicy(StrEnum):