diff --git a/src/avclan/target/avr-attiny3216/vendor/jnk0le-AVR-UART-lib/usart_config.h b/src/avclan/target/avr-attiny3216/vendor/jnk0le-AVR-UART-lib/usart_config.h
index a09e170..fdba83f 100644
--- a/src/avclan/target/avr-attiny3216/vendor/jnk0le-AVR-UART-lib/usart_config.h
+++ b/src/avclan/target/avr-attiny3216/vendor/jnk0le-AVR-UART-lib/usart_config.h
@@ -108,11 +108,11 @@
 
 // Size of the ring buffers, must be power of 2
 // default 32
-#define RX_BUFFER_SIZE 64
+#define RX_BUFFER_SIZE 128
 
 // Size of the ring buffers, must be power of 2
 // default 32
-#define TX_BUFFER_SIZE 128
+#define TX_BUFFER_SIZE 256
 
 /*******************config for multiple USART * mcu's*************************/