diff --git a/hermit/drivers/net/mmnif.c b/hermit/drivers/net/mmnif.c
index 9dcb7276f..f8e491167 100644
--- a/hermit/drivers/net/mmnif.c
+++ b/hermit/drivers/net/mmnif.c
@@ -89,7 +89,7 @@
 
 #define MMNIF_AUTO_SOCKET_TIMEOUT       500
 
-#define MMNIF_RX_BUFFERLEN		(8*1024)
+#define MMNIF_RX_BUFFERLEN		(24*1024)
 #define MMNIF_IRQ			122
 
 #ifdef DEBUG_MMNIF
diff --git a/hermit/include/hermit/config.h b/hermit/include/hermit/config.h
index 17780bde6..bce17dead 100644
--- a/hermit/include/hermit/config.h
+++ b/hermit/include/hermit/config.h
@@ -44,7 +44,7 @@ extern "C" {
 #define DEFAULT_STACK_SIZE	(64*1024*1024)
 #define KMSG_SIZE		(4*1024)
 #define INT_SYSCALL		0x80
-#define MAILBOX_SIZE	32
+#define MAILBOX_SIZE		128
 //#define WITH_PCI_IDS
 //#define SAVE_FPU