diff --git a/firmware/src/Makefile b/firmware/src/Makefile
index 6dbd1c3..1be6326 100644
--- a/firmware/src/Makefile
+++ b/firmware/src/Makefile
@@ -17,7 +17,7 @@ OBJCOPY := avr-objcopy
 SIZE := avr-size
 AVRDUDE := avrdude
 
-CFLAGS := -mmcu=$(MCU) -D F_CPU=$(SPEED) -Os -Wall -Werror -Wextra
+CFLAGS := -mmcu=$(MCU) -D F_CPU=$(SPEED) -Os -Wall -Werror -Wextra -Wpedantic
 
 all: $(TARGET) $(EEP)