diff --git a/channels_redis/core.py b/channels_redis/core.py
index 68eaad2..0bf81fa 100644
--- a/channels_redis/core.py
+++ b/channels_redis/core.py
@@ -828,7 +828,7 @@ def deserialize(self, message):
 
         if self.crypter:
             message = self.crypter.decrypt(message, self.expiry + 10)
-        return msgpack.unpackb(message, raw=False)
+        return msgpack.unpackb(message, raw=False, strict_map_key=False)
 
     ### Internal functions ###