diff --git a/Project.toml b/Project.toml
index 587e99d..6e3945f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "NATSBridge"
 uuid = "f2724d33-f338-4a57-b9f8-1be882570d10"
-version = "0.5.2"
+version = "0.5.3"
 authors = ["narawat <narawat@gmail.com>"]
 
 [deps]
diff --git a/src/NATSBridge.jl b/src/NATSBridge.jl
index b0f781e..938971a 100644
--- a/src/NATSBridge.jl
+++ b/src/NATSBridge.jl
@@ -47,7 +47,7 @@ using NATS, JSON, Arrow, HTTP, UUIDs, Dates, Base64, PrettyPrinting, DataFrames
 # ---------------------------------------------- 100 --------------------------------------------- #
 
 # Constants
-const DEFAULT_SIZE_THRESHOLD = 1_000_000  # 1MB - threshold for switching from direct to link transport
+const DEFAULT_SIZE_THRESHOLD = 500_000  # 0.5MB - threshold for switching from direct to link transport
 const DEFAULT_BROKER_URL = "nats://localhost:4222"  # Default NATS server URL
 const DEFAULT_FILESERVER_URL = "http://localhost:8080"  # Default HTTP file server URL for link transport
 
diff --git a/src/natsbridge.js b/src/natsbridge.js
index cb83e92..1711b33 100644
--- a/src/natsbridge.js
+++ b/src/natsbridge.js
@@ -19,9 +19,9 @@ const arrow = require('apache-arrow');
 // ---------------------------------------------- Constants ---------------------------------------------- //
 
 /**
- * Default size threshold for switching from direct to link transport (1MB)
+ * Default size threshold for switching from direct to link transport (0.5MB)
  */
-const DEFAULT_SIZE_THRESHOLD = 1_000_000;
+const DEFAULT_SIZE_THRESHOLD = 500_000;
 
 /**
  * Default NATS server URL
diff --git a/src/natsbridge.py b/src/natsbridge.py
index 98e456a..05fbd14 100644
--- a/src/natsbridge.py
+++ b/src/natsbridge.py
@@ -34,9 +34,9 @@ except ImportError:
 # ---------------------------------------------- Constants ---------------------------------------------- #
 
 """
-Default size threshold for switching from direct to link transport (1MB)
+Default size threshold for switching from direct to link transport (0.5MB)
 """
-DEFAULT_SIZE_THRESHOLD = 1_000_000
+DEFAULT_SIZE_THRESHOLD = 500_000
 
 """
 Default NATS server URL