diff --git a/src/openvpn/common.h b/src/openvpn/common.h
index 4e6f4809..7e9b5f3a 100644
--- a/src/openvpn/common.h
+++ b/src/openvpn/common.h
@@ -75,7 +75,7 @@ typedef unsigned long ptr_type;
  * maximum size of a single TLS message (cleartext).
  * This parameter must be >= PUSH_BUNDLE_SIZE
  */
-#define TLS_CHANNEL_BUF_SIZE 2048
+#define TLS_CHANNEL_BUF_SIZE 4096
 
 /*
  * This parameter controls the maximum size of a bundle