diff --git a/avr/devices/n21/main/main.asm b/avr/devices/n21/main/main.asm
index 4440a43..952b8f9 100644
--- a/avr/devices/n21/main/main.asm
+++ b/avr/devices/n21/main/main.asm
@@ -45,7 +45,7 @@
 ; generic
 
 .equ NET_BUFFERS_NUM            = 6
-.equ NET_BUFFERS_SIZE           = 28
+.equ NET_BUFFERS_SIZE           = 32
 
 .equ PROGRAM_SENSOR_INTERVAL_SECS = 60
 .equ PROGRAM_STATS_INTERVAL_MINS = 10
diff --git a/avr/devices/n23/main/main.asm b/avr/devices/n23/main/main.asm
index 807b993..b513ad5 100644
--- a/avr/devices/n23/main/main.asm
+++ b/avr/devices/n23/main/main.asm
@@ -45,7 +45,7 @@
 ; generic
 
 .equ NET_BUFFERS_NUM            = 6
-.equ NET_BUFFERS_SIZE           = 28
+.equ NET_BUFFERS_SIZE           = 32
 
 .equ PROGRAM_SENSOR_INTERVAL_SECS = 60
 .equ PROGRAM_STATS_INTERVAL_MINS = 10