diff --git a/avr/devices/c02/main/main.asm b/avr/devices/c02/main/main.asm
index b2ffe22..dd1c8fc 100644
--- a/avr/devices/c02/main/main.asm
+++ b/avr/devices/c02/main/main.asm
@@ -33,7 +33,7 @@
 ; ---------------------------------------------------------------------------
 ; generic
 
-.equ STACK_SIZE                   = 128
+.equ STACK_SIZE                   = 256
 
 .equ NET_BUFFERS_NUM              = 8
 .equ NET_BUFFERS_SIZE             = 32